JP2629783B2 - Curved tube heating device - Google Patents
Curved tube heating deviceInfo
- Publication number
- JP2629783B2 JP2629783B2 JP4653888A JP4653888A JP2629783B2 JP 2629783 B2 JP2629783 B2 JP 2629783B2 JP 4653888 A JP4653888 A JP 4653888A JP 4653888 A JP4653888 A JP 4653888A JP 2629783 B2 JP2629783 B2 JP 2629783B2
- Authority
- JP
- Japan
- Prior art keywords
- shaped tube
- curved
- power supply
- tube
- heating device
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims description 19
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000013021 overheating Methods 0.000 description 4
- 239000003302 ferromagnetic material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Description
【発明の詳細な説明】 A.産業上の利用分野 本発明は直接通電することによりＵ字状管を加熱する
曲管加熱装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Industrial Field of the Invention The present invention relates to a curved tube heating device that heats a U-shaped tube by direct energization.
B.発明の概要 本発明は直接通電することによりＵ字状管を加熱する
曲管加熱装置において、 Ｕ字状管の被加熱部の両端に接触して高周波電流を流
す接触子と、前記管の直線部に沿って近接する給電リー
ドと、前記管の湾曲部内側に配設された磁性体とを備え
ることにより、 湾曲部の内側のオーバーヒートを防止するとともに、
全体もしくは部分的に均熱可能とするものである。B. Summary of the Invention The present invention relates to a curved tube heating device for heating a U-shaped tube by directly energizing the tube, comprising: a contact for flowing a high-frequency current by contacting both ends of a heated portion of the U-shaped tube; By providing a power supply lead adjacent along the straight line portion and a magnetic body disposed inside the curved portion of the tube, it is possible to prevent overheating inside the curved portion,
The whole or part can be soaked.
C.従来の技術 従来から第８図に示すようなＵ字状管１を加熱する曲
管加熱装置２が知られている。この曲管加熱装置２はＵ
字状管１の被加熱部３の端部に接触された接触子４・５
に、高周波電源10を接続して直接通電することによりＵ
字状管を加熱させるものである。C. Prior Art Conventionally, a curved tube heating device 2 for heating a U-shaped tube 1 as shown in FIG. 8 is known. This curved tube heating device 2 is U
Contacts 4 and 5 that are in contact with the end of heated portion 3 of U-shaped tube 1
And a high-frequency power supply 10 connected thereto to directly energize
It heats the tube.
このようにＵ字状管を高周波電流を用いて直接通電す
ることにより加熱して温間塑性加工をするには、所定範
囲の被加熱部が均一な温度となる必要がある。In order to heat the U-shaped tube by applying a high-frequency current to the U-shaped tube for warm plastic working, it is necessary that the temperature of a heated portion in a predetermined range be uniform.
D.発明が解決しようとする課題 しかしながら、第９図に示すように、電流はＵ字状管
１の湾曲している内側に集中して流れてしまう。これは
Ｕ字状管１の対向する管部を流れる互いに逆方向の電流
同志が近接効果によって内側に集中して流れること、お
よび内側を通る電流経路の方が外側よりもインピーダン
スが低いからである。その結果、第８図に3aおよび3bに
て示す内側の部分のみが加熱されることになり、殊に3b
の部分にオーバーヒートが生じる。第10図にＡ−Ａ′の
温度分布をまた第11図にＢ−Ｂ′の温度分布を示す。第
10図および第11図の温度分布図に示すように湾曲部1b内
側がオーバーヒートしてしまうとともに、被加熱部３を
均熱することができないという問題点があった。D. Problems to be Solved by the Invention However, as shown in FIG. 9, current flows intensively inside the curved inside of the U-shaped tube 1. This is because currents flowing in opposite directions of the U-shaped tube 1 in opposite directions flow intensively inside due to the proximity effect, and the current path passing through the inside has a lower impedance than the outside. . As a result, only the inner parts indicated by 3a and 3b in FIG.
Is overheated in the area. FIG. 10 shows the temperature distribution of AA 'and FIG. 11 shows the temperature distribution of BB'. No.
As shown in the temperature distribution diagrams of FIG. 10 and FIG. 11, there is a problem that the inside of the curved portion 1b is overheated and the heated portion 3 cannot be uniformly heated.
そこで、本発明は、Ｕ字状管を直接通電により加熱す
る際、湾曲部内側のオーバーヒートを防止し、全体もし
くは部分的に均熱可能にすることを目的とする。Therefore, an object of the present invention is to prevent overheating inside a curved portion and directly or uniformly heat the U-shaped tube when the U-shaped tube is heated by direct energization.
E.課題を解決するための手段 本発明は、Ｕ字状管の被加熱部の両端に電気的に接触
して加熱用の高周波電流を流す接触子と、前記Ｕ字状管
の直線部に沿って近接して配設された前記接触子の給電
リードと、前記Ｕ字状管の湾曲部の内側に配設された磁
性体とを備えたことを、その構成とする。E. Means for Solving the Problems The present invention provides a contact that electrically contacts both ends of a heated portion of a U-shaped tube to flow a high-frequency current for heating, and a linear portion of the U-shaped tube. And a power supply lead of the contact arranged along and along the magnetic body disposed inside the curved portion of the U-shaped tube.
F.作用 高周波電流を給電リードに流し、接触子を介してＵ字
状管に直接通電すると、給電リードはＵ字状管の直線部
に近接して沿わせてあり、給電リードを流れる電流の方
向とＵ字状管の直線部や直線部近傍の湾曲部を流れる電
流の方向は互いに逆方向なので互いの電流同志の近接効
果により、直線部およびその近傍の湾曲部を流れる電流
はその内側に集中せずに給電リード近傍に分散される。F. Action When a high-frequency current is supplied to the power supply lead and the U-shaped tube is directly energized through the contact, the power supply lead is located close to the straight portion of the U-shaped tube, and the current flowing through the power supply lead is reduced. Since the direction and the direction of the current flowing through the straight portion of the U-shaped tube and the curved portion near the straight portion are opposite to each other, the current flowing through the straight portion and the curved portion near the straight portion is inward due to the proximity effect of the mutual currents. It is dispersed near the power supply lead without concentration.
また、湾曲部内側に磁性体を近接して配置したので、
湾曲部内側のインピーダンスが増加し、湾曲部を流れる
電流は湾曲部の内側に集中せずにそれの外側に分散され
る。In addition, since the magnetic material is arranged close to the inside of the curved part,
The impedance inside the bend increases, and the current flowing through the bend is not concentrated inside the bend but is distributed outside it.
G.実施例 以下、本発明の一実施例を図面に基づいて説明する。G. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図および第２図において、Ｕ字状管１を加熱する
曲管加熱装置２は、前記Ｕ字状管１の直線部1a・1aの被
加熱部３の両端に電気的に接触する二組の接触子４・4,
5・５と、前記接触子４・4,5・５の給電リード６・6,7
・７と、前記Ｕ字状管１の湾曲部1b内側に設けた磁性体
８とを備えている。In FIGS. 1 and 2, a curved tube heating device 2 for heating a U-shaped tube 1 is provided so that the both ends of a heated portion 3 of a straight portion 1a of the U-shaped tube 1 are electrically contacted. Pairs of contacts 4,4,
5.5 and the power supply leads 6.6,7 of the contacts 4,4,5,5
7 and a magnetic body 8 provided inside the curved portion 1b of the U-shaped tube 1.
前記給電リード６・6,7・７は断面矩形の棒状に形成
され前記直線部1a,1aの上・下にそれぞれ近接して配置
されている。この給電リード６・6,7・７の一端部は夫
々接触子４・4,5・５に一体に接続されると共に他側の
一端部にはそれぞれ接触端子９・９・９・９が設けら
れ、高周波電源10に接続されている。The power supply leads 6, 6, 7, 7 are formed in a rod shape having a rectangular cross section, and are disposed close to and above the straight portions 1a, 1a, respectively. One ends of the power supply leads 6, 6, 7, 7 are integrally connected to the contacts 4, 4, 5, 5, respectively, and contact terminals 9, 9, 9, 9 are provided at the other end, respectively. And is connected to a high frequency power supply 10.
前記二組の接触子４・4,5・５にはそれぞれＶ字状の
接触面4a,5aが形成されている。この接触面4a,5aにて前
記直線部1aの被加熱部３の端部の上下面を挾持し、種々
の径のＵ字状管に使用できるようになっている。V-shaped contact surfaces 4a, 5a are formed on the two sets of contacts 4, 4, 5, 5, respectively. The upper and lower surfaces of the end of the heated portion 3 of the linear portion 1a are sandwiched between the contact surfaces 4a and 5a, so that the straight portion 1a can be used for U-shaped tubes having various diameters.
前記湾曲部1b内側には強磁性体８が近接して配置され
ている。この強磁性体８としては例えば、鉄等を円弧状
に形成したものが用いられている。A ferromagnetic material 8 is disposed close to the inside of the curved portion 1b. As the ferromagnetic material 8, for example, a material in which iron or the like is formed in an arc shape is used.
次に、前記実施例の作用について説明する。 Next, the operation of the above embodiment will be described.
第１図および第３図に示すように、図外のスイッチを
ONすると高周波電源10から高周波電流が給電リード６・
６に流れ、接触子４・４を介して直線部1aの被加熱部３
の端部に直接通電され、湾曲部1b、直線部1aを径て接触
子５・５から給電リード７・７に流れる。この際、前記
給電リード６・6,7・７は直線部1aに近接して配置され
ているので、第４図に示すように電流の近接効果によ
り、直線部1aおよび直線部1a近傍の湾曲部1bを流れる電
流はその内側に集中せずに、給電リード６・6,7・７に
沿って分散して流れる。また、磁性体８のみによる作用
を説明するための図である第５図に示すように前記湾曲
部1b内側には強磁性体８を近接して配置してあるので、
この強磁性体８に磁力線が引き寄せられて、湾曲部1b内
側のインピーダンスが大きくなり、電流は湾曲部1b内側
に集中せずに外側にも分散して流れる。As shown in FIG. 1 and FIG.
When turned on, high-frequency current is supplied from the high-frequency power supply 10 to the power supply lead 6.
6, the heated portion 3 of the linear portion 1a via the contacts 4
Is supplied directly to the end of the wire, and flows from the contactor 5.5 to the power supply lead 7.7 along the curved portion 1b and the straight portion 1a. At this time, since the power supply leads 6, 6, 7 and 7 are arranged close to the linear portion 1a, as shown in FIG. 4, due to the proximity effect of the current, the curved portions near the linear portion 1a and the linear portion 1a are formed. The current flowing through the portion 1b does not concentrate on the inside, but flows along the power supply leads 6, 6, 7 and 7 in a dispersed manner. Also, as shown in FIG. 5, which is a diagram for explaining the function of only the magnetic material 8, the ferromagnetic material 8 is arranged close to the inside of the curved portion 1b.
The lines of magnetic force are attracted to the ferromagnetic body 8, and the impedance inside the curved portion 1b increases, so that the current flows dispersedly to the outside without being concentrated inside the curved portion 1b.
その結果、第３図に示すＵ字状管１を流れる電流は、
前記の給電リード６・6,7・７を設けたことによる効果
および磁性体８を配設したことによる効果によってＵ字
状管１の外側にも分散して流れるので、第６図及び第７
図の温度分布図に示されるように湾曲部1b内側のオーバ
ーヒートを防止するとともに、全体もしくは部分的に均
熱できる。As a result, the current flowing through the U-shaped tube 1 shown in FIG.
6 and 7 because the flow is dispersed also to the outside of the U-shaped tube 1 due to the effect of providing the power supply leads 6, 6, 7, and 7 and the effect of providing the magnetic body 8.
As shown in the temperature distribution diagram in the figure, it is possible to prevent overheating inside the curved portion 1b, and to uniformly or partially equalize the temperature.
なお、前記実施例において、二組の接触子４・4,5・
５をスライドして直線部1aの任意の位置に配置すること
により、被加熱部３の長さ方向の範囲を調整できる。ま
た、給電リード６・6,7・７を第１図の仮想線に示すよ
うに外側に配置することにより、第６図，第７図中に２
点鎖線で示すように周方向の被加熱部の範囲を広げた
り、温度分布を変えることもできる。また、給電リード
を湾曲部の外側にも近接して配置することにより湾曲部
1bの外側の電流を一層多くして、さらに均熱化を図るこ
ともできる。In the above embodiment, two sets of contacts 4, 4, 5, and
By sliding the slide 5 at an arbitrary position on the linear section 1a, the range in the length direction of the heated section 3 can be adjusted. Also, by arranging the power supply leads 6, 6, 7 and 7 on the outside as shown by phantom lines in FIG.
As shown by the dashed line, the range of the heated portion in the circumferential direction can be expanded, and the temperature distribution can be changed. In addition, by disposing the power supply lead close to the outside of the bending section,
By increasing the current outside 1b, it is possible to achieve even soaking.
H.発明の効果 以上の説明から明らかなように本発明によれば、Ｕ字
状管の被加熱部の両端に接触して高周波電流を流す接触
子と、前記管の直線部に沿って近接する給電リードと、
前記管の湾曲部内側に配設された磁性体とを備えている
ので、湾曲部の内側のオーバーヒートを防止するととも
に、全体もしくは部分的に均熱できるという効果があ
る。H. Effects of the Invention As is clear from the above description, according to the present invention, a contact is made to contact both ends of a heated portion of a U-shaped tube and flow a high-frequency current, and a contact is made along a straight portion of the tube. Power supply leads,
Since the magnetic body is provided inside the curved portion of the tube, there is an effect that overheating inside the curved portion can be prevented and the whole or part of the tube can be uniformly heated.
第１図〜第７図は本発明の１実施例を示すもので、第１
図は曲管加熱装置の平面図、第２図は曲管加熱装置の正
面図、第３図は曲管加熱装置の作用説明図、第４図は曲
管加熱装置の給電リードの作用説明図、第５図は曲管加
熱装置の磁性体の作用説明図、第６図は第１図における
Ａ−Ａ′の温度分布図、第７図は第１図におけるＢ−
Ｂ′の温度分布図、第８図〜第11図は従来技術を示すも
ので、第８図は曲管加熱装置の原理図、第９図は曲管加
熱装置の作用説明図、第10図は第８図におけるＡ−Ａ′
の温度分布図、第11図は第８図におけるＢ−Ｂ′の温度
分布図である。 １……Ｕ字状管、1a……直線部、1b……湾曲部、２……
曲管加熱装置、３……被加熱部、４・５……接触子、６
・７……給電リード、８……磁性体。1 to 7 show one embodiment of the present invention.
FIG. 2 is a plan view of the curved tube heating device, FIG. 2 is a front view of the curved tube heating device, FIG. 3 is an explanatory diagram of the operation of the curved tube heating device, and FIG. , FIG. 5 is a diagram for explaining the operation of the magnetic body of the curved tube heating device, FIG. 6 is a temperature distribution diagram of AA ′ in FIG. 1, and FIG.
8 to 11 show the prior art, FIG. 8 shows the principle of the curved tube heating device, FIG. 9 shows the operation of the curved tube heating device, and FIG. Is AA 'in FIG.
FIG. 11 is a temperature distribution diagram of BB 'in FIG. 1 ... U-shaped tube, 1a ... linear part, 1b ... curved part, 2 ...
Curved tube heating device, 3 ... Heated part, 4, 5 ... Contact, 6
7: Power supply lead, 8: Magnetic body.
Claims (1)
電源を接続し、該高周波電源からＵ字状管に直接高周波
電流を通電してＵ字状管を加熱する曲管加熱装置におい
て、前記Ｕ字状管の両方の直線部に夫々沿わせ、且つ該
直線部に近接して給電リードを配設し、これら各給電リ
ードの一端側を夫々Ｕ字状管の各端部に接触し、他端側
を高周波電源に接続するとともに、Ｕ字状管の湾曲部の
内側に該湾曲部に近接して磁性体を配設したことを特徴
とする曲管加熱装置。A curved tube heating device for heating a U-shaped tube by connecting a high-frequency power source to both ends of the U-shaped tube via contacts, and applying a high-frequency current directly from the high-frequency power source to the U-shaped tube. In the apparatus, a power supply lead is disposed along and in close proximity to both straight portions of the U-shaped tube, and one end of each power supply lead is connected to each end of the U-shaped tube. And a magnetic body is disposed inside the curved portion of the U-shaped tube in close proximity to the curved portion, and the other end is connected to the high frequency power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4653888A JP2629783B2 (en) | 1988-02-29 | 1988-02-29 | Curved tube heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4653888A JP2629783B2 (en) | 1988-02-29 | 1988-02-29 | Curved tube heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01221880A JPH01221880A (en) | 1989-09-05 |
| JP2629783B2 true JP2629783B2 (en) | 1997-07-16 |
Family
ID=12750070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4653888A Expired - Lifetime JP2629783B2 (en) | 1988-02-29 | 1988-02-29 | Curved tube heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2629783B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0811257B2 (en) * | 1991-03-29 | 1996-02-07 | 株式会社ユタカ技研 | Double pipe bending method |
| JP6902928B2 (en) * | 2017-05-24 | 2021-07-14 | 住友重機械工業株式会社 | Energizing heating device and energizing heating method |
-
1988
- 1988-02-29 JP JP4653888A patent/JP2629783B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01221880A (en) | 1989-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2945650B2 (en) | Electric fusion coil structure | |
| DE68909209D1 (en) | Adjustable pipe bend with electric welding device. | |
| US4795870A (en) | Conductive member having integrated self-regulating heaters | |
| KR910020804A (en) | Heat treatment device | |
| JPH0239072B2 (en) | ||
| FI101574B1 (en) | Device for heating liquid medium | |
| HUP9900670A2 (en) | Soldering iron | |
| JP2629783B2 (en) | Curved tube heating device | |
| US5721413A (en) | Method for heating closely spaced portions of two pipes | |
| TW340814B (en) | Device for welding molded parts | |
| ATE348494T1 (en) | ELECTRIC RADIANT HEATER WITH AN ACTIVE SENSOR FOR COOKING VESSEL DETECTION | |
| DE3787557D1 (en) | WELDING ELEMENT FOR WELDING BLASTED PIPES FROM PLASTIC. | |
| US3140378A (en) | Apparatus and method for welding strips onto a tube | |
| GB2164893A (en) | Pointed heat-generating device for runners of injection molding machines | |
| FI950112A0 (en) | Electrically weldable plastic part | |
| ATE161381T1 (en) | ELECTROMAGNETIC INDUCTION RADIATOR | |
| ES2032966T3 (en) | INDUCTION HEATER. | |
| US2678371A (en) | Heating inductor | |
| US4165457A (en) | Thermostatically controlled pre-weld heater | |
| JP2008054982A (en) | Hair iron | |
| ATE61464T1 (en) | ELECTRICALLY WELDABLE CONNECTING ELEMENT FOR CONNECTING RESPECTIVELY. WITH PIPE PARTS. | |
| JP2006223403A (en) | Rod for hair curling, heating unit and production method of heating unit | |
| GB2147732B (en) | Improvements in or relating to travelling wave tubes | |
| KR0130733Y1 (en) | Magnetic fieldless turbulence | |
| US2754397A (en) | Multiple plate work coil with offset edges for induction heating |