JPH0239564B2 - SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI - Google Patents

SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI

Info

Publication number
JPH0239564B2
JPH0239564B2 JP17282983A JP17282983A JPH0239564B2 JP H0239564 B2 JPH0239564 B2 JP H0239564B2 JP 17282983 A JP17282983 A JP 17282983A JP 17282983 A JP17282983 A JP 17282983A JP H0239564 B2 JPH0239564 B2 JP H0239564B2
Authority
JP
Japan
Prior art keywords
bend
pipe portion
heating device
cooling
heat
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 - Lifetime
Application number
JP17282983A
Other languages
Japanese (ja)
Other versions
JPS6067626A (en
Inventor
Shigeki Kishihara
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.)
Dai Ichi High Frequency Co Ltd
Original Assignee
Dai Ichi High Frequency Co 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 Dai Ichi High Frequency Co Ltd filed Critical Dai Ichi High Frequency Co Ltd
Priority to JP17282983A priority Critical patent/JPH0239564B2/en
Publication of JPS6067626A publication Critical patent/JPS6067626A/en
Publication of JPH0239564B2 publication Critical patent/JPH0239564B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Description

【発明の詳細な説明】 本発明は直管部と曲管部とから成る大径の袖付
金属ベンドの熱処理方法及び装置に関し、特に直
管部から曲管部及び曲管部から直管部を連続的に
熱処理する方法及び装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for heat treating a large-diameter sleeved metal bend consisting of a straight pipe section and a bent pipe section, and in particular to a heat treatment method and apparatus for heat treating a large diameter sleeved metal bend consisting of a straight pipe section and a bent pipe section. The present invention relates to a method and apparatus for continuous heat treatment.

近年流体及び固体の輸送手段として、パイプラ
インによる輸送が多く利用されるようになり、輸
送量の増大、輸送速度の高速化に伴ない、ライン
を構成する鋼管、特に曲管部はその形状から、輸
送部の管内抵抗や衝撃を直管に比べ影響を大きく
受けるため、曲管の靭性及び管内面の耐摩耗性が
要求されるようになり、曲管を熱処理した熱処理
ベンドが要望されている。しかも袖付ベンド(曲
管部の両端に管外径と同寸法程度の直管部を継目
なしで有する曲管)にすることにより、溶接部は
直管と直管の突き合わせになるため、溶接作業が
容易になり、たとえ溶接不良が発生しても、袖管
端部を切断し、再溶接を行うことができ、しかも
X線検査や溶接部の部分熱処理が曲部に比べやり
易いことで袖付熱処理ベンドの需要が増大してき
た。
In recent years, pipelines have been increasingly used as a means of transporting fluids and solids, and with the increase in transport volume and faster transport speeds, the shape of the steel pipes that make up the lines, especially the curved pipes, has changed. , as they are more affected by the internal resistance and impact of the transport section than straight pipes, the toughness of bent pipes and the abrasion resistance of the inner surface of the pipes are now required, and there is a demand for heat-treated bends that are heat-treated curved pipes. . Moreover, by making a bend with sleeves (a curved pipe that seamlessly has a straight pipe part with the same dimensions as the outside diameter of the pipe at both ends), the welding part is a straight pipe and a straight pipe butt, so welding work is easy. Even if a welding defect occurs, the sleeve tube end can be cut and re-welded, and X-ray inspection and partial heat treatment of welded parts are easier than for curved parts, making sleeve heat treatment possible. Demand for bends has increased.

従来、金属管ベンドを熱処理する場合、電気炉
やガス炉で加熱し、所望温度に達したならば、ク
レーンで吊つて液槽に浸透させ、急冷する方法が
とられているが大径ベンドになると、その形状か
ら、広い炉床面積を必要とし、大形炉で加熱して
いる現状である。従つて加熱経費が割高となり、
しかも加熱後吊り位置の安定しない高温ベンドを
クレーンで吊る危険作業が伴ない、液槽で急冷す
るため冷却むらや歪が発生し、均一な熱処理を望
めない欠点があつた。又、高周波誘導加熱を利用
した曲げ機で、直管を曲げながら熱処理する方法
もあるが、大径厚肉小アール曲げの場合、曲げ速
度との関係から、所望の冷却速度がとれない事が
あり、熱処理できる限界があつた。
Conventionally, when heat-treating metal pipe bends, the method is to heat them in an electric or gas furnace, and once the desired temperature is reached, suspend them with a crane and allow the liquid to permeate into a bath for rapid cooling. Due to its shape, it requires a large hearth area and is currently heated in a large furnace. Therefore, heating costs are relatively high,
Moreover, it involves the dangerous work of hoisting a high-temperature bend with an unstable crane after heating, and because it is rapidly cooled in a liquid tank, uneven cooling and distortion occur, making it impossible to achieve uniform heat treatment. There is also a method of heat-treating straight pipes while bending them using a bending machine that uses high-frequency induction heating, but in the case of large-diameter, thick-wall, small-radius bends, the desired cooling rate may not be achieved due to the relationship with the bending speed. However, there was a limit to what could be heat treated.

本発明は従来技術が持つ上述のような欠点を除
去し、大形設備を必要とせず、大径の袖付ベンド
を均一に熱処理して高品質の袖付熱処理ベンドを
得ることのできる熱処理方法及び装置を提供する
ことを目的とする。
The present invention eliminates the above-mentioned drawbacks of the prior art, and provides a heat treatment method and apparatus that can uniformly heat-treat large-diameter sleeved bends to obtain high-quality sleeved heat-treated bends without requiring large-scale equipment. The purpose is to provide

上記目的を達成すべくなされた本発明は袖付ベ
ンドを環状にかつ局部的に加熱する環状加熱装置
と、環状に加熱された部分に冷却媒体を噴射する
冷却装置とを、袖付ベンドの長手方向に沿つて相
対的に移動させ、袖付ベンドを連続的に熱処理す
るものであり、この際、袖付ベンドの直管部の熱
処理時には前記ベンドを静止させ前記環状加熱装
置及び冷却装置を前記直管部に沿つて直線状に移
動させ、袖付ベンドの曲管部の熱処理時には前記
環状加熱装置及び冷却装置を静止させ、前記ベン
ドを曲管部の曲げ中心のまわりに旋回させること
を特徴とする。
The present invention, which has been made to achieve the above object, includes an annular heating device that annularly and locally heats the sleeved bend, and a cooling device that injects a cooling medium to the annularly heated portion in the longitudinal direction of the sleeved bend. The sleeved bend is continuously heat-treated by moving the sleeved bend relatively along the sleeved bend. At this time, when heat-treating the straight pipe portion of the sleeved bend, the bend is kept stationary and the annular heating device and cooling device are placed on the straight pipe portion. The annular heating device and the cooling device are kept stationary during the heat treatment of the curved pipe portion of the sleeved bend, and the bend is rotated around the bending center of the curved pipe portion.

以下、添付図面に示す実施例を用いて本発明を
更に詳細に説明する。
Hereinafter, the present invention will be explained in more detail using embodiments shown in the accompanying drawings.

第1図、第2図、第3図は本発明の熱処理方法
の一実施例を概略的に示している。袖付ベンド1
は通常直管を曲げて製造されており、両端の直管
部1Aと中央の曲管部1Bとから成つている。袖
付ベンド1は曲管部1Bの曲げ中心Oのまわりに
旋回しうるよう配置されている。第1図におい
て、下側の直管部1Aの下端を取り囲んで環状加
熱装置2及び環状の冷却装置3が配置され、かつ
ベンド内に冷却装置4が配置されている。加熱装
置2は袖付ベンド1を環状にかつ局部的に加熱し
うるもので、例えば高周波加熱誘導子が使用可能
である。ベンド外側の冷却装置3はベンドの外面
の環状の部分に冷却媒体例えば水を噴射しうるも
のであり以下外面ジヤケツトと呼ぶ。ベンド内側
の冷却装置4はベンド内面の環状の部分に冷却媒
体例えば水を噴射しうるものであり、以下内面ジ
ヤケツトと呼ぶ。外面ジヤケツト3と内面ジヤケ
ツト4とはそれぞれの冷却線5,6(噴射された
冷却媒体の描く線)のベンド円周上での位置が一
致するように配置される。加熱装置2及び内外面
ジヤケツト3,4は垂直に往復動しうるように構
成されている。
1, 2, and 3 schematically show an embodiment of the heat treatment method of the present invention. Bend with sleeves 1
is usually manufactured by bending a straight pipe, and consists of straight pipe parts 1A at both ends and a curved pipe part 1B in the center. The sleeved bend 1 is arranged so as to be able to turn around the bending center O of the bent pipe portion 1B. In FIG. 1, an annular heating device 2 and an annular cooling device 3 are disposed surrounding the lower end of the lower straight pipe portion 1A, and a cooling device 4 is disposed within the bend. The heating device 2 is capable of annularly and locally heating the sleeve bend 1, and for example, a high frequency heating inductor can be used. The cooling device 3 on the outside of the bend is capable of injecting a cooling medium, such as water, onto an annular portion of the outside surface of the bend, and is hereinafter referred to as an outside jacket. The cooling device 4 on the inside of the bend is capable of injecting a cooling medium, such as water, onto the annular portion of the inner surface of the bend, and is hereinafter referred to as an inner jacket. The outer jacket 3 and the inner jacket 4 are arranged so that the positions of their respective cooling lines 5 and 6 (lines drawn by the injected cooling medium) on the bend circumference coincide. The heating device 2 and the inner and outer jackets 3, 4 are configured to be able to reciprocate vertically.

次に熱処理動作を説明する。第1図において、
袖付ベンド1を静止させた状態で加熱装置2及び
内外面ジヤケツト3,4を直管部1Aに沿つて上
昇させる。すると加熱装置2で環状に加熱された
部分が直管部1Aを移動し、かつ冷却装置3,4
からの冷却媒体により急冷され熱処理が行われ
る。
Next, the heat treatment operation will be explained. In Figure 1,
The heating device 2 and the inner and outer jackets 3 and 4 are raised along the straight pipe portion 1A while the sleeved bend 1 is kept stationary. Then, the part heated annularly by the heating device 2 moves through the straight pipe section 1A, and the part heated by the heating device 2 moves through the straight pipe section 1A, and the cooling device 3 and 4
It is rapidly cooled with a cooling medium and heat treatment is performed.

加熱装置2及び内外面ジヤケツト3,4が袖付
ベンド1の曲げ中心Oを通る水平線上に到達する
と停止させ、それと同時に袖付ベンド1を曲げ中
心Oのまわりに旋回させる。かくして、曲管部1
Bが加熱装置2及び内外面ジヤケツト3,4に対
して移動し、換言すれば曲管部1Bに沿つて加熱
装置2及び内外面ジヤケツト3,4が移動するこ
とになり、曲管部1Bが熱処理される。この時、
第2図に示すように内面ジヤケツト4を旋回中心
側が上になるようにわずかに傾ける。これは、第
4図に示すように、直管部1Aの冷却時には内外
面ジヤケツト3,4の冷却線5,6の管円周上で
の位置P、Qが一致していても、曲管部1Bの処
理時には冷却線5,6の管円周上での位置がP′、
Q′となり、ずれてしまうから、これを修正する
ために行うものである。このように内面ジヤケツ
ト4を傾けたことにより、外面ジヤケツト3と内
面ジヤケツト4の冷却線の位置が管円周上で一致
し、曲管部の均一な熱処理ができる。
When the heating device 2 and the inner and outer jackets 3, 4 reach a horizontal line passing through the bending center O of the sleeve bend 1, they are stopped, and at the same time the sleeve bend 1 is turned around the bending center O. Thus, the bent pipe section 1
B moves with respect to the heating device 2 and the inner and outer jackets 3, 4, in other words, the heating device 2 and the inner and outer jackets 3, 4 move along the curved tube section 1B, and the curved tube section 1B moves along the curved tube section 1B. Heat treated. At this time,
As shown in FIG. 2, tilt the inner jacket 4 slightly so that the center of rotation faces upward. As shown in FIG. 4, when cooling the straight pipe part 1A, even if the positions P and Q of the cooling lines 5 and 6 of the inner and outer jackets 3 and 4 on the pipe circumference are the same, when cooling the straight pipe part 1A, the curved pipe part 1A is cooled. When processing part 1B, the positions of the cooling lines 5 and 6 on the tube circumference are P',
This is done to correct this, since it becomes Q' and deviates. By tilting the inner jacket 4 in this manner, the positions of the cooling lines of the outer jacket 3 and the inner jacket 4 are aligned on the tube circumference, allowing uniform heat treatment of the curved tube section.

袖付ベンド1を旋回させて、第3図に示すよう
に、曲管部の終端つまり曲管部と直管部の境界部
が加熱装置2及び内外面ジヤケツト3,4のとこ
ろに達すると、袖付ベンド1の旋回を停止し、そ
れと同時に加熱装置2及び内外面ジヤケツト3,
4を上方に向けて移動させる。この時、内面ジヤ
ケツト4は傾きを元の水平状態に戻しておく。か
くして、直管部の熱処理が行われる。
When the sleeved bend 1 is turned and the end of the bent pipe section, that is, the boundary between the bent pipe section and the straight pipe section reaches the heating device 2 and the inner and outer jackets 3 and 4, as shown in FIG. The turning of the bend 1 is stopped, and at the same time the heating device 2 and the inner and outer jackets 3,
Move 4 upward. At this time, the inner jacket 4 is returned to its original horizontal state. In this way, the straight pipe portion is heat treated.

上記のように、本発明は袖付ベンドを環状に局
部的に加熱冷却し、この加熱冷却位置を袖付ベン
ドの長手方向に連続的に移動させることにより、
袖付ベンドを熱処理するものである。このような
熱処理においては管円周上の温度均一が重要であ
る。直管部1Aにおいては加熱装置2が直管部1
Aの中心軸線に対して直角を保つて移動してお
り、管円周上の各部分での移動速度が均一であ
り、従つて加熱時間が均一であるので、問題はな
い。一方、曲管部1Bの熱処理時には、曲管部1
Bが曲げ中心Oのまわりに旋回しているので、曲
管部の旋回軸側は反対側に比べ周速が遅い。従つ
て、単位面積当りの加熱時間は旋回軸側が反対軸
よりも長い。ところが、袖付ベンド1は通常直管
を曲げて製造されており、このため、第1図に示
すように曲管部断肉厚が曲げ中心側で素管に比べ
増肉し、反対側には素管に比べ減肉している。こ
のため、増肉した部分(曲げ中心側)を低速で動
かし、かつ減肉した部分(反対側)を高速で動か
すことになり、管円周上の各部分での単位体積当
りの投入熱量がほぼ等しく、従つてほぼ均一な加
熱が行われる。
As described above, the present invention locally heats and cools the sleeved bend in an annular shape, and continuously moves this heating and cooling position in the longitudinal direction of the sleeved bend.
This method heat-treats the sleeve bend. In such heat treatment, it is important to maintain temperature uniformity around the circumference of the tube. In the straight pipe section 1A, the heating device 2
There is no problem because the tube moves at right angles to the central axis of A, and the moving speed is uniform at each portion on the circumference of the tube, and therefore the heating time is uniform. On the other hand, during the heat treatment of the curved tube portion 1B, the curved tube portion 1
Since B is turning around the bending center O, the circumferential speed on the turning axis side of the bent pipe portion is slower than on the opposite side. Therefore, the heating time per unit area is longer on the rotating axis side than on the opposite axis. However, the bend with sleeves 1 is usually manufactured by bending a straight pipe, and for this reason, as shown in Fig. 1, the wall thickness of the bent pipe is thicker on the bending center side compared to the plain pipe, and on the opposite side there is The wall thickness is reduced compared to the original pipe. Therefore, the part with increased thickness (on the bending center side) is moved at low speed, and the part with reduced thickness (on the opposite side) is moved at high speed, which reduces the amount of heat input per unit volume at each part on the tube circumference. Approximately equal and therefore approximately uniform heating takes place.

なお、厳密には、曲管部において、第5図に示
すように曲げ中心軸N−Nに対し、肉厚の変動し
ていない中立軸E−Eが曲げ半径Rに対し、わず
かに(距離eだけ)外方にずれている。このた
め、増肉側では周速が低下する以上に増肉が生
じ、従つて投入熱量が不足し勝ちである。管円周
上に渡り温度をより正確に均一にするには、増肉
側の加熱装置の加熱面積を広くし、昇温時間を長
くすると共に、加熱装置2と曲管部とのクリアラ
ンスを狭くし、又減肉側は加熱面積を狭くし昇温
時間を短くすると共に、クリアランスを広くする
ことが望ましい。
Strictly speaking, in the bent pipe section, with respect to the bending center axis N-N, the neutral axis E-E, where the wall thickness does not vary, is slightly (distance) relative to the bending radius R, as shown in Figure 5. (only e) is shifted outward. For this reason, on the thickening side, the thickness increases more than the circumferential speed decreases, and therefore the amount of heat input tends to be insufficient. In order to more accurately uniformize the temperature over the circumference of the tube, increase the heating area of the heating device on the thickening side, lengthen the temperature rise time, and narrow the clearance between the heating device 2 and the curved tube section. However, on the thinner side, it is desirable to narrow the heating area, shorten the heating time, and widen the clearance.

もし、等肉ベンドを熱処理する場合には、旋回
軸側の加熱装置面積を狭くし、昇温時間を短くす
ると共に、加熱装置と曲管部のクリアランスを広
くし、反対側は加熱装置面積を広くとり昇温時間
を長くすると共にクリアランスを狭くするかコア
を取付ければ管円周上において温度均一がはか
れ、良好な熱処理が可能となる。
If heat treating a bend of equal thickness, narrow the area of the heating device on the pivot axis side, shorten the temperature rise time, widen the clearance between the heating device and the bent pipe section, and reduce the area of the heating device on the opposite side. If the clearance is widened and the temperature rising time is lengthened and the clearance is narrowed or a core is installed, the temperature can be uniformed over the circumference of the tube, and good heat treatment can be performed.

第6図、第7図は第1図〜第3図に示した熱処
理を実際に行う熱処理装置10を示している。同
図において、熱処理装置10は袖付ベンド1を保
持し、曲管部の曲げ中心のまわりに旋回させるベ
ンド旋回装置11を有する。ベンド旋回装置11
は架台12と架台12に回転自在に保持された旋
回軸13と、旋回軸13に保持された第1アーム
14及び第2アーム15と、各アーム先端のクラ
ンプ16,16と、旋回軸13に連結された旋回
用駆動部17等を有している。第2アーム15は
旋回軸13に固定されるが、第1アーム14は旋
回軸13に対して回転可能であり、旋回軸13に
固定された面板18により適当な角度位置に固定
される。第1アーム14の取付角度は袖付ベンド
1の曲げ角度に応じて調整される。クランプ1
6,16は袖付ベンド1をアーム14,15に固
定保持させるものであり、クランプ16,16の
内径及び位置を変更させることにより、袖付ベン
ドの外径及び曲げ半径の変化に対応できる。
6 and 7 show a heat treatment apparatus 10 that actually performs the heat treatment shown in FIGS. 1 to 3. In the figure, the heat treatment apparatus 10 has a bend turning device 11 that holds the sleeved bend 1 and turns it around the bending center of the bent pipe section. Bend turning device 11
are the pedestal 12, the pivot shaft 13 rotatably held by the pedestal 12, the first arm 14 and second arm 15 held by the pivot shaft 13, the clamps 16, 16 at the tips of each arm, and the pivot shaft 13. It has a connected turning drive section 17 and the like. The second arm 15 is fixed to the pivot shaft 13, but the first arm 14 is rotatable relative to the pivot shaft 13, and is fixed at an appropriate angular position by a face plate 18 fixed to the pivot shaft 13. The mounting angle of the first arm 14 is adjusted according to the bending angle of the sleeve bend 1. Clamp 1
Reference numerals 6 and 16 fix and hold the sleeve bend 1 on the arms 14 and 15, and by changing the inner diameter and position of the clamps 16 and 16, changes in the outer diameter and bending radius of the sleeve bend can be accommodated.

袖付ベンド1内には袖付ベンド1の中心軸線上
に中空の槍19が、その両端を槍支持棒20で袖
付ベンド1内面に固定されて、配置されている。
槍19には移動フレーム22に保持された1対の
ガイドローラ21,21が係合し、フレーム22
を槍19に沿つて移動可能としている。なお、フ
レーム22は第7図では槍19の両側にそれぞれ
別体として示されているがこれらは図示しない部
材により一体に連結されている。フレーム22に
は更にピン23を介して内面ジヤケツト4が揺動
しうるように保持され、この内面ジヤケツト4は
通常はばね24により水平に保たれている。内面
ジヤケツト4は傾斜用ローラ25を有し、該ロー
ラ25はフレーム22が槍19に沿つて移動する
時、槍に取付られている傾斜用ガイド26に係合
し、内面ジヤケツト4を傾斜させる。
A hollow spear 19 is arranged inside the sleeved bend 1 on the central axis of the sleeved bend 1, with both ends thereof being fixed to the inner surface of the sleeved bend 1 with spear support rods 20.
A pair of guide rollers 21 , 21 held by a moving frame 22 engage with the spear 19 , and the frame 22
is movable along the spear 19. Although the frames 22 are shown as separate bodies on both sides of the spear 19 in FIG. 7, they are integrally connected by a member not shown. An inner jacket 4 is further held on the frame 22 so as to be able to swing through a pin 23, and this inner jacket 4 is normally kept horizontal by a spring 24. The inner jacket 4 has a tilting roller 25 which engages a tilting guide 26 attached to the spear and tilts the inner jacket 4 as the frame 22 moves along the spear 19.

槍19の両端にはホイル27,27が取付ら
れ、ホイル27,27には無端状チエーン又はロ
ープ28が掛け渡されている。チエーン28は槍
19の内部と外部を通つており、槍19の外面に
はチエーン28を案内するガイド29も取付られ
ている。なお、傾斜用ガイド26はチエーン案内
用のガイド29の一部をなしている。チエーン2
8は槍19の外側で内面ジヤケツト4を支持する
フレーム22に連結されており(図面では連結部
材を省略している)、また槍19の上端のホイル
27には駆動部30が接続されている。かくし
て、駆動部30でホイル27を回転させチエーン
28を走行させることにより、フレーム22及び
内面ジヤケツト4を槍19に沿つて走行させるこ
とができる。
Foils 27, 27 are attached to both ends of the spear 19, and an endless chain or rope 28 is stretched between the foils 27, 27. The chain 28 passes through the inside and outside of the spear 19, and a guide 29 for guiding the chain 28 is also attached to the outside surface of the spear 19. Note that the tilting guide 26 forms a part of the chain guiding guide 29. chain 2
8 is connected to a frame 22 that supports the inner jacket 4 on the outside of the spear 19 (the connecting member is omitted in the drawing), and a drive unit 30 is connected to the foil 27 at the upper end of the spear 19. . Thus, by rotating the wheel 27 with the drive unit 30 and causing the chain 28 to run, the frame 22 and inner jacket 4 can be made to run along the spear 19.

高周波加熱誘導子で構成された加熱装置2及び
外面ジヤケツト3は高周波トランス31に水平方
向位置を調節可能に接続され、高周波トランス3
1は垂直なレール32に案内されると共にトラン
ス上下駆動装置33により上下動されるようにな
つている。なお、図中34はウエイト、35は冷
却水供給管である。
The heating device 2 and the outer jacket 3, which are constituted by a high frequency heating inductor, are connected to a high frequency transformer 31 so that their horizontal positions can be adjusted.
1 is guided by a vertical rail 32 and is moved up and down by a transformer vertical drive device 33. In addition, in the figure, 34 is a weight, and 35 is a cooling water supply pipe.

次に、上記装置の作動を説明する。熱処理開始
時、袖付ベンド1は第6図図示位置にセツトされ
ており、袖付ベンド1及びベンド旋回装置11と
もに静止している。一方、加熱装置2及び外面ジ
ヤケツト3は高周波トランス31と一緒に袖付ベ
ンド1の直管部の下端に位置し、内面ジヤケツト
4は外面ジヤケツト3と冷却線の一致する位置に
位置している。加熱冷却を開始すると、高周波ト
ランス31の駆動装置33と内面ジヤケツト4の
駆動部30が同速度で駆動し、加熱装置22、外
面ジヤケツト3、内面ジヤケツト4を同時に上昇
させる。かくして直管部の熱処理が行われる。加
熱装置2及び外面ジヤケツト3、内面ジヤケツト
4が上昇して直管部と曲管部の境界部に到達する
と、駆動装置33が停止して高周波トランス31
の上昇を停止し、それと同時に内面ジヤケツト4
の駆動部30は駆動したままで、旋回用駆動部1
7が駆動を始め、袖付ベンド1が時計方向に旋回
を始める。この時、駆動部30による内面ジヤケ
ツト4の槍19に対する移動速度と旋回用駆動部
17による袖付ベンド内の槍19の移動速度とは
等しく設定されているので、内面ジヤケツト4は
見掛け上静止し、袖付ベンド1及びその内部の槍
19のみが移動することとなる。かくして、曲管
部の熱処理が行われる。なお、曲管部の熱処理開
始時に内面ジヤケツト4の傾斜用ローラ25が槍
19に取付られている傾斜用ガイド26に接触
し、内面ジヤケツト4をピン23のまわりにわず
かに傾斜させ、この状態で曲管部の熱処理が行わ
れている。
Next, the operation of the above device will be explained. At the start of the heat treatment, the sleeve bend 1 is set at the position shown in FIG. 6, and both the sleeve bend 1 and the bend turning device 11 are stationary. On the other hand, the heating device 2 and the outer jacket 3 are located together with the high frequency transformer 31 at the lower end of the straight tube part of the sleeved bend 1, and the inner jacket 4 is located at a position where the outer jacket 3 and the cooling line coincide. When heating and cooling are started, the drive device 33 of the high frequency transformer 31 and the drive section 30 of the inner jacket 4 are driven at the same speed, raising the heating device 22, the outer jacket 3, and the inner jacket 4 simultaneously. In this way, the straight pipe portion is heat treated. When the heating device 2, outer jacket 3, and inner jacket 4 rise and reach the boundary between the straight pipe section and the curved pipe section, the drive device 33 stops and the high frequency transformer 31
stops rising, and at the same time the inner jacket 4
The drive unit 30 remains driven, and the swing drive unit 1
7 begins to drive, and the sleeved bend 1 begins to rotate clockwise. At this time, since the moving speed of the inner jacket 4 relative to the spear 19 by the driving section 30 and the moving speed of the spear 19 in the sleeve bend by the turning drive section 17 are set equal, the inner jacket 4 is apparently stationary; Only the sleeved bend 1 and the spear 19 inside thereof will move. In this way, the heat treatment of the bent pipe portion is performed. Note that when the heat treatment of the bent pipe section is started, the tilting roller 25 of the inner jacket 4 contacts the tilting guide 26 attached to the spear 19, and the inner jacket 4 is slightly tilted around the pin 23. Heat treatment is being performed on the bent pipe section.

加熱装置2及び内外面ジヤケツト3,4が袖付
ベンド1の旋回により曲管部と直管部との境界部
に到達すると、旋回を停止し、それと同時に高周
波トランス駆動装置33を再び駆動する。この
時、内面ジヤケツト4の傾斜用ローラ25は槍1
9の傾斜用ガイド26から離れ、内面ジヤケツト
4は元の位置に戻つている。かくして、加熱装置
2及び内外面ジヤケツト3,4は停止した袖付ベ
ンド1の直管部に沿つて上昇し直管部の熱処理を
行う。以上で袖付ベンドの連続熱処理が終了す
る。
When the heating device 2 and the inner and outer jackets 3, 4 reach the boundary between the curved pipe section and the straight pipe section due to the rotation of the sleeved bend 1, the rotation is stopped, and at the same time, the high frequency transformer drive device 33 is driven again. At this time, the inclination roller 25 of the inner jacket 4 is
9, the inner jacket 4 has returned to its original position. Thus, the heating device 2 and the inner and outer jackets 3, 4 rise along the straight pipe section of the stopped sleeve bend 1 to heat-treat the straight pipe section. This completes the continuous heat treatment of the armhole bend.

なお、上記実施例では袖付ベンド直管部を熱処
理する時、内面ジヤケツト4を槍19に対して上
方に移動させているがこの代りに、槍19を下方
から上方に、加熱装置2、外面ジヤケツト3と同
速度で移動させてもよい。更に、上記実施例では
袖付ベンドの熱処理において、外面加熱、内外面
冷却の場合を示したが、大径で厚肉の袖付ベンド
を熱処理する場合、第8図に示すように内面ジヤ
ケツト4の上に内面加熱装置7を設け、内外面加
熱及び内外面冷却を行うようにしてもよい。又、
袖付ベンド1の用途や材質に応じて、内面のみ或
は外面のみに熱処理を行うようにしてもよい。更
に、袖付ベンドの熱処理姿勢は図示実施例のよう
に加熱装置及び内外面ジヤケツトを水平に保ち、
袖付ベンドを水平な旋回軸のまわりに旋回させる
場合に限定されず、適宜変更してもよい。
In the above embodiment, when heat-treating the bent straight pipe section with sleeves, the inner jacket 4 is moved upward with respect to the spear 19, but instead of this, the spear 19 is moved upward from the heating device 2 and the outer jacket. It may be moved at the same speed as 3. Furthermore, in the above embodiment, in the heat treatment of the sleeved bend, the outer surface is heated and the inner and outer surfaces are cooled. However, when heat treating a large diameter and thick sleeved bend, the upper part of the inner jacket 4 is heated as shown in FIG. An inner surface heating device 7 may be provided to perform inner and outer surface heating and inner and outer surface cooling. or,
Depending on the purpose and material of the sleeved bend 1, heat treatment may be performed only on the inner surface or only on the outer surface. Furthermore, the heat treatment position of the sleeved bend is such that the heating device and the inner and outer jackets are kept horizontal as in the illustrated embodiment.
It is not limited to the case where the sleeved bend is turned around a horizontal turning axis, and may be changed as appropriate.

以上のように、本発明によれば袖付ベンドを環
状に局部的に加熱冷却しかつその加熱冷却位置を
袖付ベンドに沿つて移動させているので、環状に
局部的にかつ連続的に熱処理でき、従来の如くベ
ンド全体を加熱冷却する場合に比べ変形や曲がり
が少く、熱処理後の矯正を必要としない。しか
も、全体加熱冷却でないので、大型の設備を必要
としない。また、環状の加熱冷却域を袖付ベンド
に沿つて移動させるには、加熱及び冷却装置をベ
ンドの直管部では直線状に移動させ、曲管部では
静止させてベンド自体を旋回させるよう構成して
いるので、加熱及び冷却装置の駆動機構及び袖付
ベンドの駆動機構を比較的簡単に出来、かつ加熱
及び冷却装置を袖付ベンドの管壁とのクリアラン
スを一定に保つて両者を相対的に移動させること
ができ、均一な熱処理が可能である。
As described above, according to the present invention, since the sleeve bend is locally heated and cooled in an annular shape and the heating and cooling position is moved along the sleeve bend, heat treatment can be performed locally and continuously in the annular shape. Compared to the conventional case where the entire bend is heated and cooled, there is less deformation and bending, and there is no need for straightening after heat treatment. Moreover, since the entire system is not heated or cooled, large-scale equipment is not required. In addition, in order to move the annular heating and cooling region along the armhole bend, the heating and cooling device is configured to move linearly in the straight pipe section of the bend, remain stationary in the curved pipe section, and rotate the bend itself. As a result, the drive mechanism of the heating and cooling device and the drive mechanism of the sleeve bend can be relatively simple, and the clearance between the heating and cooling device and the pipe wall of the sleeve bend can be kept constant and the two can be moved relative to each other. This enables uniform heat treatment.

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

第1図、第2図、第3図は本発明の一実施例に
おける熱処理手順を示す概略図、第4図は内面ジ
ヤケツト4、外面ジヤケツト3、の冷却線と袖付
ベンド管壁との位置関係を説明する拡大説明図、
第5図は袖付ベンドの曲管部の曲げ中心軸と中立
軸との関係を示す説明図、第6図は第1図〜第3
図に示した熱処理を実施する具体的装置の側断面
図、第7図は第6図の装置の一部断面上面図、第
8図は他の実施例を示す概略図である。 1…袖付ベンド、1A…直管部、1B…曲管
部、2…加熱装置、3…冷却装置(外面ジヤケツ
ト)、4…冷却装置(内面ジヤケツト)、10…熱
処理装置、11…ベンド旋回装置、19…槍、2
8…チエーン、30…駆動部、31…高周波トラ
ンス、33…トランス上下駆動装置。
Figures 1, 2, and 3 are schematic diagrams showing the heat treatment procedure in an embodiment of the present invention, and Figure 4 is the positional relationship between the cooling wires of the inner jacket 4 and the outer jacket 3 and the sleeved bend pipe wall. An enlarged explanatory diagram explaining
Figure 5 is an explanatory diagram showing the relationship between the bending center axis and the neutral axis of the bent pipe part of the sleeve bend, and Figure 6 is
7 is a partially sectional top view of the apparatus shown in FIG. 6, and FIG. 8 is a schematic diagram showing another embodiment. 1... Bend with sleeves, 1A... Straight pipe section, 1B... Bent pipe section, 2... Heating device, 3... Cooling device (outer jacket), 4... Cooling device (inner jacket), 10... Heat treatment device, 11... Bend turning device , 19...spear, 2
8...Chain, 30...Drive unit, 31...High frequency transformer, 33...Transformer vertical drive device.

Claims (1)

【特許請求の範囲】 1 直管部と曲管部とから成る袖付ベンドの熱処
理方法において、袖付ベンドを環状にかつ局部的
に加熱する環状加熱装置と、環状に加熱された部
分に冷却媒体を噴射する冷却装置とを設け、前記
直管部の熱処理時には前記ベンドを静止させ前記
環状加熱装置及び冷却装置を前記直管部に沿つて
直線状に移動させ、前記曲管部の熱処理時には前
記環状加熱装置及び冷却装置を静止させ、前記ベ
ンドを前記曲管部の曲げ中心のまわりに旋回さ
せ、直管部と曲管部を連続的に熱処理することを
特徴とする袖付ベンドの熱処理方法。 2 前記冷却装置をベンド内外に設け、ベンド内
の冷却装置を前記直管部の熱処理時には前記直管
部の中心軸線に対して直角に配置し、前記曲管部
の熱処理時にはベンド内外の冷却装置の冷却線の
位置が管円周上において一致するよう、傾斜させ
ることを特徴とする特許請求の範囲第1項記載の
熱処理方法。 3 前記環状加熱装置の前記曲管部の増肉側の加
熱面積を減肉側よりも広くし、かつ前記環状加熱
装置と曲管部の増肉側とのクリアランスを減肉側
よりも広くしたことを特徴とする特許請求の範囲
第1項又は第2項記載の熱処理方法。 4 直管部と曲管部とから成る袖付ベンドの熱処
理装置において、 前記ベンドを保持し、曲管部の曲げ中心のまわ
りに旋回させるベンド旋回装置と、 該ベンド旋回装置に保持されたベンド内に該ベ
ンドの中心軸線に沿つて配置された槍と、 該槍に移動可能に保持されベンド内面に環状に
冷却媒体を噴射する冷却装置と、 該冷却装置を前記槍に沿つて移動させる手段
と、 前記ベンドを取り囲んで配置されベンドを環状
に加熱する環状加熱装置と、 該環状加熱装置を直線状に往復動させる手段と
を有することを特徴とする袖付ベンドの熱処理装
置。
[Claims] 1. A heat treatment method for a sleeved bend consisting of a straight pipe section and a bent pipe section, which includes: an annular heating device that locally and annularly heats the sleeved bend; and a cooling medium applied to the annularly heated section. The annular heating device and the cooling device are provided with a cooling device that sprays water, and when the straight pipe portion is heat treated, the bend is kept stationary, and the annular heating device and the cooling device are moved linearly along the straight pipe portion, and when the bent pipe portion is heat treated, the annular heating device and the cooling device are moved linearly along the straight pipe portion. A method for heat treating a sleeved bend, characterized in that a heating device and a cooling device are kept stationary, the bend is turned around the bending center of the bent pipe portion, and the straight pipe portion and the bent pipe portion are continuously heat treated. 2. The cooling device is provided inside and outside the bend, the cooling device inside the bend is arranged perpendicular to the center axis of the straight pipe portion when the straight pipe portion is heat-treated, and the cooling device inside and outside the bend is placed when heat-treating the curved pipe portion. 2. The heat treatment method according to claim 1, wherein the cooling lines are inclined so that the positions of the cooling lines coincide on the circumference of the tube. 3. The heating area of the annular heating device on the thickening side of the curved pipe portion is made wider than the thinning side, and the clearance between the annular heating device and the thickening side of the bent pipe portion is wider than on the thinning side. A heat treatment method according to claim 1 or 2, characterized in that: 4. A heat treatment apparatus for sleeved bends consisting of a straight pipe section and a bent pipe section, comprising: a bend turning device that holds the bend and turns it around the bending center of the bent pipe section; and a bend inside the bend held by the bend turning device. a spear disposed along the central axis of the bend; a cooling device movably held by the spear and injecting a cooling medium in an annular manner onto the inner surface of the bend; and means for moving the cooling device along the spear. A heat treatment apparatus for a sleeved bend, comprising: an annular heating device arranged to surround the bend and annularly heat the bend; and means for linearly reciprocating the annular heating device.
JP17282983A 1983-09-19 1983-09-19 SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI Expired - Lifetime JPH0239564B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17282983A JPH0239564B2 (en) 1983-09-19 1983-09-19 SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17282983A JPH0239564B2 (en) 1983-09-19 1983-09-19 SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI

Publications (2)

Publication Number Publication Date
JPS6067626A JPS6067626A (en) 1985-04-18
JPH0239564B2 true JPH0239564B2 (en) 1990-09-06

Family

ID=15949124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17282983A Expired - Lifetime JPH0239564B2 (en) 1983-09-19 1983-09-19 SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI

Country Status (1)

Country Link
JP (1) JPH0239564B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015129577A (en) * 2014-01-06 2015-07-16 智 小野寺 Existing pipe reclamation member of single item and pipeline member of single item
CN113400221A (en) * 2021-05-06 2021-09-17 江西铜业集团(贵溪)防腐工程有限公司 Electric melting pipeline and elbow press-fitting frame and manufacturing method thereof

Also Published As

Publication number Publication date
JPS6067626A (en) 1985-04-18

Similar Documents

Publication Publication Date Title
US3804390A (en) Apparatus and method for heat-treating large diameter steel pipe
US3915763A (en) Method for heat-treating large diameter steel pipe
US4195506A (en) Method and apparatus for bending elongated materials
EP0509700A1 (en) Fabrication of pressure vessels
US3525842A (en) Apparatus for the heat-treatment of round bodies
JP3524037B2 (en) Induction tempering method and apparatus for crankshaft
KR20160132837A (en) Heat-treatment device and heat-treatment method
JPH0239564B2 (en) SODETSUKIBENDONETSUSHORIHOHOOYOBISOCHI
JPS6281272A (en) Method and apparatus for welding diaphragm of steam turbine
US5104462A (en) Scanning induction hardening process by using radially moving induction coil
US5235837A (en) Fabrication of pressure vessels
CN107900166A (en) A kind of medium-frequency pipe bender
US5433800A (en) Scanning induction hardening
JP2745282B2 (en) High frequency induction heating device
JP5765684B2 (en) Heat treatment method
CN108326400A (en) A kind of spiral welded pipe automatic repair welding device and its application method
CN212042431U (en) Spring steel wire processing device for improving fatigue performance of high-strength spring steel wire
JPH0247289B2 (en) KINZOKUKANNOMAGEKAKOKENNETSUSHORIHOHOOYOBISOCHI
JPH10146620A (en) Bending device by linear heating
JP3408996B2 (en) Rack induction hardening apparatus and induction hardening method
CN215453314U (en) Thick plate alloy steel circumferential weld preheating device
JP7175621B2 (en) induction heating device
CN116329828B (en) Pressure container butt joint groove structure, welding device and welding method
JPS617021A (en) Production of heat treated bended tube with straight tube part
JPH046768B2 (en)