JPH09136111A - Fin-tube and production therefor - Google Patents
Fin-tube and production thereforInfo
- Publication number
- JPH09136111A JPH09136111A JP8204313A JP20431396A JPH09136111A JP H09136111 A JPH09136111 A JP H09136111A JP 8204313 A JP8204313 A JP 8204313A JP 20431396 A JP20431396 A JP 20431396A JP H09136111 A JPH09136111 A JP H09136111A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- tube
- metal strip
- spiral
- spiral groove
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車や建設機械
の油冷却管、居住用空間の温湿度を調整する空調機、食
品の鮮度を保って保存する冷凍冷蔵庫、化学設備の反応
塔等に広く利用されているフィンチューブとその製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil cooling pipe of an automobile or a construction machine, an air conditioner for adjusting the temperature and humidity of a living space, a freezer / refrigerator for keeping food fresh and a reaction tower of chemical equipment. The present invention relates to a widely used fin tube and its manufacturing method.
【０００２】[0002]
【従来の技術】従来、自動車や建設機械の油冷却管、居
住用空間の温湿度を調整する空調機、食品の鮮度を保っ
て保存する冷凍冷蔵庫、化学設備の反応塔等には、金属
管の外周に転造処理により螺旋状フィンを一体に成形し
て設けたフィンチューブや、金属管に直接フィンを巻き
付けるフィン巻付機を用いてフィンを巻き付けられた金
属管をろう材浴中に浸漬し、ろう付けして得たフィンチ
ューブ、さらには、金属管の外周面に螺旋状フィンの内
周端部を連続してろう付けまたは溶接して得たフィンチ
ューブ等が多く利用されていた。2. Description of the Related Art Conventionally, metal tubes are used for oil cooling pipes of automobiles and construction machines, air conditioners for adjusting the temperature and humidity of living spaces, refrigerators / freezers for keeping foods fresh, and reaction towers of chemical equipment. Immerse the fin tube in which the spiral fin is integrally formed by the rolling process on the outer periphery of the metal tube or the metal tube with the fin wound using the fin winding machine that directly winds the metal tube into the brazing filler metal bath. However, a fin tube obtained by brazing, and further, a fin tube obtained by continuously brazing or welding the inner peripheral end portion of the spiral fin to the outer peripheral surface of the metal tube have been widely used.
【０００３】[0003]
【発明が解決しようとする課題】従来のフィンチューブ
は上記のようにして形成されているものであって、金属
管の内部を流れる加熱流体から伝達された熱を金属管に
蓄積させることなく、外部に対して迅速に放散する作用
を持たせているものである。しかしながら、その製造に
際しては、製品完成までに長時間を要し、また、加熱流
体から金属管に伝達される熱伝導速度も充分でないた
め、これら諸点に関する改善が望まれていた。The conventional fin tube is formed as described above, and the heat transferred from the heating fluid flowing inside the metal tube is not accumulated in the metal tube. It has a function of rapidly radiating to the outside. However, in the production thereof, it takes a long time to complete the product, and the rate of heat transfer from the heated fluid to the metal tube is not sufficient, and therefore improvements in these points have been desired.
【０００４】本発明は、上記の課題を解決して、放熱効
果が高いとともに、製作所要時間が短縮され、かつ高強
度のフィンチューブおよびその製造方法を提供すること
を目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a fin tube having a high heat dissipation effect, a reduced manufacturing time, and a high strength, and a method for manufacturing the fin tube.
【０００５】[0005]
【課題を解決するための手段】本発明者等は上記の課題
を解決するため、研究、開発を重ねた結果、簡便な処理
方法を採用することにより目的を達成した。以下にその
詳細を示す。In order to solve the above-mentioned problems, the present inventors have achieved the object by adopting a simple processing method as a result of repeated research and development. The details are shown below.
【０００６】金属管と該金属管に巻き付けられる金属帯
材とによって構成される本発明に係るフィンチューブ
は、金属帯材の内周端部が金属管の外面に形成された螺
旋状凹溝内に嵌合して巻き付けられてなることを特徴と
する。また、本発明による金属帯材は、該螺旋状凹溝が
形成された外面に対応する内面に螺旋状突出部が形成さ
れてなることが好ましく、さらに前記金属帯材は、少な
くとも内周端部が波形に形成されるとともに、前記波形
の幅が金属管外面に形成された螺旋状凹溝の溝幅とほぼ
等しく形成されてなることが好ましい。The fin tube according to the present invention, which is composed of a metal pipe and a metal strip wound around the metal pipe, has a spiral groove formed by forming an inner peripheral end of the metal strip on the outer surface of the metal pipe. It is characterized in that it is fitted and wound around. Further, the metal strip according to the present invention preferably has a spiral protrusion formed on an inner surface corresponding to the outer surface on which the spiral groove is formed, and further, the metal strip has at least an inner peripheral end portion. Is preferably formed in a corrugated shape, and the width of the corrugated shape is substantially equal to the groove width of the spiral concave groove formed on the outer surface of the metal tube.
【０００７】本発明によるフィンチューブでは、少なく
とも長手方向の両端部において金属管に固着され、かつ
前記螺旋状凹溝を塑性加工により形成するとともに、該
螺旋状凹溝の底面には凹凸を形成することもできる。In the fin tube according to the present invention, at least both ends in the longitudinal direction are fixed to the metal tube, the spiral groove is formed by plastic working, and irregularities are formed on the bottom surface of the spiral groove. You can also
【０００８】さらに本発明は、金属管と該金属管に巻き
付けられる金属帯材とによって構成されるフィンチュー
ブの製造方法において、金属管の外面に螺旋状凹溝を形
成し、該螺旋状凹溝に金属帯材の内周端部を嵌合して巻
き付けて形成することを特徴とするものである。この場
合、前記金属管の外面の螺旋状凹溝と内面の螺旋状突出
部とを同時に形成することが好ましく、さらに金属帯材
の内周端部もしくは全体を波形に形成するとともに、該
波形の幅とほぼ等しい溝幅の螺旋状凹溝を金属管の外面
に形成し、該螺旋状凹溝に前記波形を嵌合して巻き付け
ることが好ましい。The present invention further provides a fin tube manufacturing method comprising a metal tube and a metal strip wound around the metal tube, wherein a spiral groove is formed on the outer surface of the metal tube, and the spiral groove is formed. It is characterized in that the inner peripheral end portion of the metal strip is fitted and wound around. In this case, it is preferable to form the spiral groove on the outer surface of the metal tube and the spiral protrusion on the inner surface at the same time. It is preferable that a spiral groove having a groove width substantially equal to the width is formed on the outer surface of the metal tube, and the corrugation is fitted and wound around the spiral groove.
【０００９】さらに、本発明では、前記金属管と前記螺
旋状凹溝に嵌合して巻き付けられた金属帯材の少なくと
も長手方向の両端部において前記金属管と固着された
り、金属管の外面に形成された螺旋状凹溝に対応して、
金属管の内面に螺旋状突出部を形成してフィンチューブ
を製造したり、或いは前記金属管を回転させながら前記
螺旋状凹溝に金属帯材を嵌合して巻き付けるたり、さら
には金属管の外面に螺旋状凹溝を形成する場合、前記金
属管の外面に形成された螺旋状凹溝の底面に凹凸を形成
することもできる。Further, according to the present invention, the metal tube is fixed to the metal tube at least at both ends in the longitudinal direction of the metal strip fitted and wound in the spiral groove, or the metal strip is attached to the outer surface of the metal tube. Corresponding to the spiral groove formed,
A fin tube is manufactured by forming a spiral protrusion on the inner surface of a metal tube, or a metal strip is fitted and wound around the spiral groove while rotating the metal tube, When forming the spiral groove on the outer surface, it is possible to form irregularities on the bottom surface of the spiral groove formed on the outer surface of the metal tube.
【００１０】さらにまた、前記フィンチューブを形成す
る場合、金属帯材の板面が金属管の外面と直交する方向
に位置するようにして、該金属管の外面に金属帯材を螺
旋状に巻き付け、該金属帯材の内周端部を前記金属管の
外面に密接し、次いで前記金属帯材の外周端部から前記
金属管の中心軸線方向に対して径方向に圧接し、該圧接
により前記金属管の外面には螺旋状に巻き付けられた金
属帯材によって螺旋状凹溝が、また金属管の内面には該
螺旋状凹溝に対応して螺旋状突出部が形成されると同時
に、前記螺旋状凹溝に金属帯材の内周端部が嵌合される
ことがより好ましい。この場合、前記金属帯材を前記金
属管の外面に螺旋状に巻き付ける際に、該金属管を回転
させて金属帯材を金属管の外面に圧接することにより該
金属管の管壁に塑性加工に伴う螺旋状凹溝を形成させる
と同時に該螺旋状凹溝に金属帯材を嵌合して巻き付ける
と一層好ましい。また、前記金属管と嵌合して巻き付け
られた螺旋状の金属帯材の少なくとも長手方向の両端部
において前記金属管と固着することもできる。Furthermore, when the fin tube is formed, the metal strip is spirally wound around the outer surface of the metal tube such that the plate surface of the metal strip is positioned in the direction orthogonal to the outer surface of the metal tube. , The inner peripheral end of the metal strip is brought into close contact with the outer surface of the metal pipe, and then the outer peripheral end of the metal strip is pressed in the radial direction with respect to the central axis direction of the metal pipe. A spiral groove is formed on the outer surface of the metal tube by the spirally wound metal strip, and a spiral protrusion is formed on the inner surface of the metal tube corresponding to the spiral groove. More preferably, the inner peripheral edge of the metal strip is fitted in the spiral groove. In this case, when the metal strip is wound around the outer surface of the metal pipe in a spiral shape, the metal pipe is rotated to press the metal strip against the outer surface of the metal pipe so as to perform plastic working on the pipe wall of the metal pipe. It is more preferable that the spiral groove is formed at the same time as the metal groove is fitted and wound around the spiral groove. Further, it is also possible to fix the spirally-wound metal strip fitted and wound around the metal pipe to the metal pipe at least at both ends in the longitudinal direction.
【００１１】本発明は、金属管の外面に螺旋状凹溝を形
成し、該螺旋状凹溝に金属帯材の内周端部を嵌合して巻
き付け、金属管と嵌合して巻き付け、好ましくは金属帯
材の長手方向の両端部において螺旋状金属帯材と金属管
とを一体にろう付け、溶接およびカシメ等の適宜の手段
により固着するか、あるいは前記螺旋状凹溝と金属帯材
の内周端部とを全体に亘って一体にろう付けまたは溶接
してフィンチューブを形成するととともに、金属管の内
面に螺旋状突出部を形成してなるため、金属管内面を流
動する流体に乱流を形成させ、これにより流体から金属
管への熱伝達度を高めて、結果的にフィンチューブの放
熱効果を高くさせる。なお、金属帯材を金属管の外面に
螺旋状に巻き付ける際に、前記金属管を回転させて、該
金属帯材の外周端部から前記金属管の中心軸線方向に対
して径方向に、金属帯材を金属管の外面に圧接し、必要
に応じさらに該金属管の回転による金属帯材の巻き付け
方向とは反対方向に該金属帯材を強く引張ることによ
り、該金属管の管壁に塑性加工に伴う螺旋状凹溝を形成
させると同時に該螺旋状凹溝に金属帯材を嵌合して巻き
付けると効率的である。このようにして、本発明ではフ
ィンチューブ製作に要する時間を従来に比して著しく短
縮させることができる。According to the present invention, a spiral groove is formed on the outer surface of a metal tube, the inner peripheral end of a metal strip is fitted and wound in the spiral groove, and the spiral groove is fitted and wound in a metal tube. Preferably, the spiral metal strip and the metal pipe are integrally brazed at both ends in the longitudinal direction of the metal strip and fixed by appropriate means such as welding and caulking, or the spiral groove and the metal strip are fixed. Since the fin tube is formed by integrally brazing or welding the inner peripheral end of the metal pipe and the spiral protrusion on the inner surface of the metal pipe, the fluid flowing on the inner surface of the metal pipe is A turbulent flow is formed, thereby increasing the heat transfer rate from the fluid to the metal tube, and consequently increasing the heat dissipation effect of the fin tube. When the metal strip is wound around the outer surface of the metal pipe in a spiral shape, the metal pipe is rotated so that the metal strip extends from the outer peripheral end of the metal strip in the radial direction with respect to the central axis direction of the metal pipe. By pressing the strip material onto the outer surface of the metal tube and further pulling the metal strip material strongly in the direction opposite to the winding direction of the metal strip by the rotation of the metal tube, if necessary, the pipe wall of the metal tube is plasticized. It is efficient to form a spiral groove along with processing and simultaneously fit and wind a metal strip into the spiral groove. In this way, in the present invention, the time required to manufacture the fin tube can be significantly shortened as compared with the conventional case.
【００１２】[0012]
【発明の実施の形態】次に本発明を添付図面について詳
細に説明する。図１は本発明の一実施例を示す図で、
（ａ）は側面図、（ｂ）は正面図、図２は図１の実施例
の側面断面図、図３は本発明に係る方法を説明する図
で、（ａ）は側面図、（ｂ）は正面図、図４は本発明の
他の実施例の螺旋状凹溝に沿った部分断面図、図５は本
発明のさらに他の実施例の方法を示す説明図で、（ａ）
は側面図、（ｂ）は（ａ）のＶ−Ｖ線上の部分断面図、
図６は図５の方法の工程を示す拡大断面図で、（ａ）は
図５（ｂ）のＡ−Ａ線上の部分断面図、（ｂ）は図５
（ｂ）のＢ−Ｂ線上の部分断面図、（ｃ）は図５（ｂ）
のＣ−Ｃ線上の部分断面図、図７は本発明のさらに別の
実施例を示す図で、（ａ）は部分波形の実施例の一部断
面斜視図、（ｂ）は全体波形の実施例の一部断面斜視
図、図８は金属帯材同士を重合せて当該部分に切込みを
入れその部分を外側に曲げて止める方法を示す斜視図、
図９は金属帯材の末端部を金属管上で管軸と平行に折曲
げ、金属管に外嵌した金属バンドで前記折曲げた屈曲部
を挟みスポット溶接し、その後かしめ止めする方法を示
す斜視図であって、１は鉄、ステンレス、銅、真鍮、ア
ルミニウム等からなる金属管、２は金属管１の外面に螺
旋状に形成された凹溝、３は前記螺旋状凹溝２に嵌合し
て巻き付けられ前記金属管１と同一の材質等からなる金
属帯材、４は該金属帯材３の内周端部、５ａ、５ｂはそ
の両端部、６は金属管１の内面に形成された螺旋状の突
出部である。BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing an embodiment of the present invention.
(A) is a side view, (b) is a front view, FIG. 2 is a side sectional view of the embodiment of FIG. 1, FIG. 3 is a diagram for explaining the method according to the present invention, (a) is a side view, (b) ) Is a front view, FIG. 4 is a partial cross-sectional view along a spiral groove of another embodiment of the present invention, and FIG. 5 is an explanatory view showing a method of still another embodiment of the present invention.
Is a side view, (b) is a partial sectional view taken along the line V-V of (a),
6A and 6B are enlarged cross-sectional views showing the steps of the method of FIG. 5, FIG. 6A is a partial cross-sectional view taken along line AA of FIG. 5B, and FIG.
FIG. 5B is a partial cross-sectional view taken along the line BB of FIG.
7 is a partial cross-sectional view taken along line C-C of FIG. 7, FIG. 7 is a view showing yet another embodiment of the present invention, (a) is a partial cross-sectional perspective view of a partial corrugated embodiment, and (b) is an overall corrugated embodiment. FIG. 8 is a partial cross-sectional perspective view of an example, and FIG. 8 is a perspective view showing a method of overlapping metal strips with each other to make a notch in the relevant portion and bend the portion outward to stop the same.
FIG. 9 shows a method of bending the end portion of the metal strip on the metal pipe in parallel with the pipe axis, sandwiching the bent portion with the metal band fitted on the metal pipe, spot welding, and then caulking. 1 is a perspective view, 1 is a metal tube made of iron, stainless steel, copper, brass, aluminum, etc., 2 is a groove formed in a spiral shape on the outer surface of the metal tube 1, and 3 is a fitting into the spiral groove 2. Metal strips made of the same material as the metal pipe 1 and wound together, 4 are inner peripheral end portions of the metal strip 3, 5a and 5b are both end portions thereof, and 6 is formed on the inner surface of the metal pipe 1. It is a spiral-shaped protruding portion.
【００１３】このようなフィンチューブを製造するに
は、図３に示すように予めその外面に螺旋状の凹溝２を
形成され、また好ましくはその内面にも螺旋状の突出部
６を形成された金属管１を回転させながら金属帯材３の
内周端部４を該螺旋状凹溝２に嵌合するよう巻き付けて
形成したり、或いは図５および図６に示すように金属管
１を回転させながら前記金属管の外面に金属帯材３を螺
旋状に巻き付けるに際し、金属帯材３の外周端部から少
なくとも２つの押圧ローラ７（図５においては２個の押
圧ローラ７と１個のガイドローラ７′が図示されている
が、図６にはこれらローラは省略させている）を用いて
前記金属管１の中心軸線方向に対して径方向（矢印
（イ）方向）に圧接し、必要に応じさらに該金属管１の
回転による金属帯材３の巻き付け方向とは反対方向で金
属管１の外周面の接線方向（矢印（ロ）方向）に該金属
帯材３を強く引張ることにより、前記金属管１の管壁を
塑性加工してその外面には螺旋状凹溝２が、また金属管
の内面には該螺旋状凹溝に対応して螺旋状突出部６が形
成されると同時に、該金属帯材３を該螺旋状の凹溝２に
嵌合して形成する。In order to manufacture such a fin tube, as shown in FIG. 3, a spiral groove 2 is formed in advance on the outer surface thereof, and preferably a spiral protrusion 6 is also formed on the inner surface thereof. The metal pipe 1 is formed by winding the inner peripheral end portion 4 of the metal strip 3 so as to fit into the spiral groove 2 while rotating the metal pipe 1, or as shown in FIGS. When the metal strip 3 is spirally wound around the outer surface of the metal tube while being rotated, at least two pressing rollers 7 (two pressing rollers 7 and one Although guide rollers 7'are shown, these rollers are omitted in FIG. 6) and are pressed in the radial direction (arrow (a) direction) with respect to the central axis direction of the metal tube 1, If necessary, the metal strip 3 is rotated by rotating the metal tube 1. By strongly pulling the metal strip 3 in the tangential direction (arrow (b) direction) of the outer peripheral surface of the metal tube 1 in the direction opposite to the attaching direction, the metal wall of the metal tube 1 is plastically worked to form its outer surface. A spiral recessed groove 2 is formed on the inner surface of the metal pipe, and a spiral projection 6 is formed on the inner surface of the metal tube corresponding to the spiral recessed groove. It is formed by fitting.
【００１４】このようにして螺旋状凹溝２に嵌合するよ
う巻き付けられた金属帯材３は、螺旋状凹溝２にその内
周端部４が嵌合しているため金属帯材３が金属管１に対
して軸方向の位置ズレを発生しないが、さらに位置ズレ
を防止して強固に固着するためには、次いで金属帯材３
の両端部５ａ、５ｂを金属管１に対してろう付けまたは
溶接により固着したり、或いは例えば図８に示すごと
く、金属帯材３の端部５ａ、５ｂをその手前の螺旋状巻
き付け部に相重ね、その重合部８に切込み８ａを入れ、
この切込み８ａによって作られた複数の切片８ｂをその
付根部より交互に外側に湾曲せしめたり、図示しないが
重合部８を単にスポット溶接したり、または図９に示す
ごとく、金属帯材３の端部５ａ、５ｂを金属管１上で管
軸と平行に折曲げて屈曲部５ｃを形成し、該金属管１に
外嵌した金属バンド９で前記屈曲部５ｃをサンドイッチ
状に挟み、屈曲部５ｃ挟持部をスポット溶接９ｂして屈
曲部５ｃと一体化するとともに、金属バンド５の金属管
１の外嵌部をかしめ９ａにて当該バンドを金属管１に固
着する方法を用いることができる。また必要に応じ金属
帯材３の内周端部４の全体に亘って金属管１の螺旋状凹
溝２内にろう付けまたは溶接することもできる。The metal strip 3 wound in such a manner as to be fitted in the spiral groove 2 has the inner circumferential end portion 4 fitted in the spiral groove 2, so that the metal strip 3 is Although no positional deviation occurs in the axial direction with respect to the metal tube 1, in order to prevent further positional deviation and to firmly fix the metal tube 1, the metal strip 3
Both end portions 5a, 5b of the metal strip 3 are fixed to the metal tube 1 by brazing or welding, or, for example, as shown in FIG. Overlap, make a cut 8a in the overlapping portion 8,
The plurality of sections 8b formed by the notches 8a are alternately curved outward from the root portion thereof, or the overlapping portion 8 is simply spot-welded (not shown), or as shown in FIG. The bent portions 5a and 5b are bent on the metal tube 1 in parallel with the tube axis to form a bent portion 5c, and the bent portion 5c is sandwiched between the metal bands 9 fitted on the metal tube 1 to form a bent portion 5c. A method can be used in which the sandwiching portion is spot-welded 9b to be integrated with the bent portion 5c, and the outer fitting portion of the metal tube 1 of the metal band 5 is fixed to the metal tube 1 by caulking 9a. If necessary, the entire inner peripheral end 4 of the metal strip 3 can be brazed or welded into the spiral groove 2 of the metal tube 1.
【００１５】なお、前記螺旋状凹溝２の底面には図４の
ように軸方向の筋や梨地等からなる凹凸を設けると金属
帯材３の位置ズレを防止できるので好ましい。さらに、
図６のように螺旋状に巻き付けられた金属帯材３を、
（ａ）のようにその外周端部が直線状に、またその内周
端部４が波形に形成するか、或いは（ｂ）のように幅手
方向（金属帯材を巻き付けた時は高さ方向）全体に亘っ
て波形とするとともに、その内周端部４において形成さ
れた波形の幅が金属管１の外面に形成された螺旋状凹溝
２の溝幅とほぼ等しく形成すると、凹溝２内で金属帯材
３が安定し、また熱伝達面積が増大するとともに、熱伝
達が確実になるため放熱効果が一層向上するので好まし
い。Incidentally, it is preferable that the bottom surface of the spiral groove 2 is provided with irregularities such as axial streaks or satin as shown in FIG. 4 because the metal strip 3 can be prevented from being displaced. further,
As shown in FIG. 6, the metal strip 3 wound in a spiral shape is
As shown in (a), its outer peripheral end is formed in a straight line and its inner peripheral end 4 is formed in a corrugated shape, or as in (b), it is formed in the width direction (height when a metal strip is wound). Direction), and the width of the corrugation formed at the inner peripheral end 4 thereof is substantially equal to the groove width of the spiral groove 2 formed on the outer surface of the metal tube 1, This is preferable because the metal strip 3 is stable in the area 2, the heat transfer area is increased, and the heat transfer is ensured, so that the heat dissipation effect is further improved.
【００１６】なお、前記波形は金属帯材３の幅手方向の
一部または全部に予めギア加工等しておき、前記のよう
に圧接、および所望に応じ引張りにより金属管１に螺旋
状凹溝２を形成すると同時に該凹溝に金属帯材３を嵌合
して巻き付ける際に、この嵌合、巻き付けとともに、形
成できる。すなわち、前記ギア加工部分は金属帯材３の
巻き付け時に伸び率の違いによって皺状に塑性変形して
波形となる。Incidentally, the corrugation is preliminarily gear-processed on a part or all of the width direction of the metal strip 3, and the spiral groove is formed on the metal tube 1 by pressure contact as described above and pulling as desired. When the metal strip 3 is fitted and wound in the groove at the same time that the groove 2 is formed, it can be formed together with this fitting and winding. That is, the gear-processed portion plastically deforms in a wrinkle shape due to a difference in elongation when the metal strip 3 is wound to form a wavy shape.
【００１７】[0017]
【実施例】以下、本発明の実施例を説明する。 ［実施例１］外径が１２．７ｍｍで、肉厚が１．０ｍ
ｍ、長さが４ｍの鋼管からなる金属管１の外面に、螺旋
状にピッチが４ｍｍで、深さが０．３ｍｍ、幅が０．５
５ｍｍの螺旋状凹溝２を形成する。一方厚さが０．５ｍ
ｍで、板幅が６ｍｍの鋼からなる金属帯材３を、前記螺
旋状凹溝２に該金属帯材３の内周端部４が嵌合するよう
金属管１を回転させながら巻き付け、金属管１の凹溝２
に嵌合して巻き付けられた金属帯材３の長手方向の両端
部５ａ、５ｂにおいて螺旋状の金属帯材３と金属管１と
を一体にろう付けにより固着してフィンチューブを形成
した。得られたフィンチューブはフィンの強度も高く、
放熱効果も満足の行くものであった。Embodiments of the present invention will be described below. [Example 1] Outer diameter is 12.7 mm and wall thickness is 1.0 m
The pitch is 4 mm, the depth is 0.3 mm, and the width is 0.5 on the outer surface of the metal pipe 1 made of a steel pipe having a length of m and a length of 4 m.
A 5 mm spiral groove 2 is formed. On the other hand, the thickness is 0.5m
m, a metal strip 3 made of steel having a plate width of 6 mm is wound while rotating the metal tube 1 so that the inner peripheral end 4 of the metal strip 3 fits into the spiral groove 2. Groove 2 of tube 1
At both ends 5a, 5b in the longitudinal direction of the metal strip 3 fitted and wound around, the spiral metal strip 3 and the metal tube 1 were integrally fixed by brazing to form a fin tube. The fin tube obtained has high fin strength,
The heat dissipation effect was also satisfactory.
【００１８】［実施例２］外径が６．４ｍｍで、肉厚が
０．５ｍｍ、長さが６ｍの銅管からなる金属管１の外面
に、ロールなどを用いてピッチが３ｍｍで、深さが０．
５ｍｍ、幅が０．５５ｍｍの螺旋状凹溝２を形成すると
同時に、該螺旋状凹溝２に対応して、金属管１の内面に
突出高さが０．５ｍｍの螺旋状突出部６を塑性加工によ
り形成する。一方厚さが０．５ｍｍで、板幅が７ｍｍの
鋼からなる金属帯材３を、該金属帯材３の内周端部４が
前記螺旋状凹溝２に嵌合するよう巻き付け、巻き付けら
れた金属帯材３の長手方向の両端部５ａ、５ｂを金属管
１に図８のように固着した他は実施例１と同様にしてフ
ィンチューブを製作した。その結果は製作所要時間が少
なく、放熱効果も満足の行くものであった。[Embodiment 2] A metal pipe 1 made of a copper pipe having an outer diameter of 6.4 mm, a wall thickness of 0.5 mm, and a length of 6 m is formed on the outer surface of a metal pipe 1 using a roll or the like with a pitch of 3 mm and a deep depth. Is 0.
At the same time as forming the spiral groove 2 having a width of 5 mm and a width of 0.55 mm, the spiral projection 6 having a projection height of 0.5 mm is plastically formed on the inner surface of the metal tube 1 corresponding to the spiral groove 2. It is formed by processing. On the other hand, a metal strip 3 made of steel having a thickness of 0.5 mm and a plate width of 7 mm is wound and wound so that the inner peripheral end portion 4 of the metal strip 3 fits into the spiral groove 2. A fin tube was manufactured in the same manner as in Example 1 except that the longitudinal ends 5a and 5b of the metal strip 3 were fixed to the metal tube 1 as shown in FIG. As a result, the manufacturing time was short and the heat dissipation effect was satisfactory.
【００１９】［実施例３］図４に示すように、金属管１
の外面に螺旋状凹溝２を形成する場合、前記螺旋状凹溝
２の底面に高低差０．１ｍｍの筋条の凹凸を形成し、次
いで軸方向の筋からなる凹凸を底面に有する螺旋状凹溝
２に金属帯材３の内周端部４を嵌合して巻き付け、巻き
付けられた金属帯材３の長手方向の両端部５ａ、５ｂを
金属管１に図９のように固着した他は実施例１と同様に
してフィンチューブを製作した。得られたフィンチュー
ブは高強度を有するとともに、放熱効果も満足の行くも
のであった。[Embodiment 3] As shown in FIG.
When the spiral groove 2 is formed on the outer surface of the spiral groove 2, the spiral groove having a height difference of 0.1 mm is formed on the bottom surface of the spiral groove 2, and then the bottom surface is provided with an uneven surface consisting of axial stripes. The inner peripheral end 4 of the metal strip 3 is fitted into the groove 2 and wound, and both longitudinal ends 5a and 5b of the wound metal strip 3 are fixed to the metal tube 1 as shown in FIG. A fin tube was manufactured in the same manner as in Example 1. The obtained fin tube had high strength and the heat dissipation effect was also satisfactory.
【００２０】［実施例４］金属帯材３の板面が金属管１
の外面と直交する方向に位置するようにして、外径１５
ｍｍ、肉厚０．９ｍｍのＳＴＫＭ１１Ａからなる金属管
１の外面に、該金属管１を回転させながら板幅９ｍｍ、
厚さ０．９ｍｍのＳＰＨＣからなる金属帯材３をピッチ
４．０ｍｍで螺旋状に巻き付ける際に、該金属帯材３の
内周端部４を前記金属管１の外面に密接し、図５のよう
に前記金属帯材３の外周端部８から前記金属管１の中心
軸線方向に対して径方向（矢印（イ）方向）に２個のロ
ール７を用いて強く圧接する。この金属帯材３の圧接に
より、前記金属管１の管壁が塑性加工して外面には螺旋
状凹溝２が、また金属管１の内面には該螺旋状凹溝２に
対応して螺旋状突出部６が形成されると同時に、金属管
１の外面に形成された螺旋状凹溝２に金属帯材３の内周
端部４が嵌合して巻き付けられることになる。その後、
少なくとも、金属管１と嵌合した螺旋状の金属帯材３の
長手方向の両端部５ａ，５ｂにおいて、螺旋状金属帯材
３と金属管１とを一体に溶接して固着しフィンチューブ
を形成した。この場合、製作所要時間は極めて短縮さ
れ、かつ放熱効果も満足の行くものであった。[Embodiment 4] The plate surface of the metal strip 3 is the metal tube 1.
So that it is positioned in a direction orthogonal to the outer surface of
mm, and a wall width of 9 mm on the outer surface of the metal tube 1 made of STKM 11A having a wall thickness of 0.9 mm, while rotating the metal tube 1.
When spirally winding a metal strip 3 made of SPHC having a thickness of 0.9 mm at a pitch of 4.0 mm, the inner peripheral end portion 4 of the metal strip 3 is brought into close contact with the outer surface of the metal pipe 1, As described above, two rolls 7 are strongly pressed from the outer peripheral end 8 of the metal strip 3 in the radial direction (arrow (a) direction) with respect to the central axis direction of the metal tube 1. Due to the pressure contact of the metal strip 3, the tube wall of the metal tube 1 is plastically processed to form a spiral groove 2 on the outer surface and a spiral groove 2 on the inner surface of the metal tube 1 corresponding to the spiral groove 2. At the same time that the projecting portion 6 is formed, the inner peripheral end portion 4 of the metal strip 3 is fitted and wound in the spiral groove 2 formed on the outer surface of the metal tube 1. afterwards,
At least at both longitudinal ends 5a and 5b of the spiral metal strip 3 fitted with the metal pipe 1, the spiral metal strip 3 and the metal pipe 1 are integrally welded and fixed to each other to form a fin tube. did. In this case, the time required for production was extremely shortened, and the heat dissipation effect was satisfactory.
【００２１】［実施例５］外径が２７．０ｍｍで、肉厚
が０．７ｍｍ、長さ３ｍｍのＳＵＳ ３０４Ｌからなる
金属管１の外面に、厚さが１．０ｍｍ、板幅が１０ｍｍ
の、予め幅手方向の８ｍｍに亘ってギア加工されたＳＵ
Ｓ ３０４からなる金属帯材３をピッチ６．０ｍｍで螺
旋状に巻き付けるに際して、実施例４と同様に金属管１
の中心軸線方向に対して径方向（矢印（イ）方向）に２
個のロール７を用いて強く圧接するとともに、金属管１
の回転による金属帯材３の巻き付け方向とは反対方向で
かつ該金属管１の外周面の接線方向（矢印（ロ）方向）
に金属帯材３を強く引張る。この金属帯材３の圧接と引
張りにより、前記金属管１の管壁が塑性加工して外面に
は螺旋状凹溝２が、また金属管１の内面に該螺旋状凹溝
２に対応して螺旋状突出部６が形成されると同時に、金
属管１の外面に形成された螺旋状凹溝２に螺旋状金属帯
材３の内周端部４が嵌合するとともに、金属帯材３のギ
ア加工された内周端部４側が金属帯材３の伸び率の違い
により変形して図７（ａ）のように波形となる。この形
成された波形の幅は同時に形成された螺旋状凹溝２の溝
幅とほぼ等しくなる。その後、金属帯材３の少なくとも
長手方向の両端部５ａ，５ｂを仮付溶接にて固定し、内
周端部４を全長に亘りＮｉろう付けしてフィンチューブ
を製作した。その結果はいずれも製作所要時間が少な
く、金属管に対する金属帯材の位置ズレもなく、放熱効
果も満足の行くものであった。[Embodiment 5] A metal tube 1 made of SUS 304L having an outer diameter of 27.0 mm, a wall thickness of 0.7 mm and a length of 3 mm is provided on the outer surface with a thickness of 1.0 mm and a plate width of 10 mm.
Of the SU that has been gear-processed over 8 mm in the width direction in advance
When the metal strip 3 made of S 304 was spirally wound at a pitch of 6.0 mm, the metal tube 1 was prepared in the same manner as in Example 4.
2 in the radial direction (arrow (a) direction) with respect to the central axis direction of
The metal pipe 1 is strongly pressed by using individual rolls 7
The direction opposite to the winding direction of the metal strip 3 by the rotation of and the tangential direction of the outer peripheral surface of the metal tube 1 (arrow (b) direction)
The metal strip 3 is strongly pulled. By pressing and pulling the metal strip 3, the tube wall of the metal tube 1 is plastically processed to form a spiral groove 2 on the outer surface and a spiral groove 2 on the inner surface of the metal tube 1 corresponding to the spiral groove 2. At the same time when the spiral protrusion 6 is formed, the inner peripheral end 4 of the spiral metal strip 3 is fitted into the spiral recessed groove 2 formed on the outer surface of the metal tube 1, and the metal strip 3 The gear processed inner peripheral end portion 4 side is deformed due to the difference in the elongation rate of the metal strip 3 to form a waveform as shown in FIG. The width of this formed corrugation is substantially equal to the groove width of the spiral groove 2 formed at the same time. After that, at least both longitudinal end portions 5a and 5b of the metal strip 3 were fixed by temporary welding, and the inner peripheral end portion 4 was brazed with Ni over the entire length to manufacture a fin tube. As a result, the manufacturing time was short, there was no displacement of the metal strip with respect to the metal tube, and the heat dissipation effect was satisfactory.
【００２２】[0022]
【発明の効果】本発明は、金属管の外面に螺旋状凹溝を
形成し、この螺旋状凹溝に金属帯材を嵌合して巻き付け
金属管と金属帯材とを一体に形成するので、螺旋状の金
属帯材のピッチにバラツキがなく、また金属管内部に設
けた螺旋状突出部によって、金属管の内部を移動する流
体に旋回力を与えて乱流を生じさせたことにより金属管
内表面での境界層を薄くしたことにより、放熱効果が一
層効果的となったフィンチューブの製作が可能になっ
た。また、螺旋状の金属帯材と金属管とを一体にする際
に、好ましくは金属管と螺旋状の金属帯材の少なくとも
長手方向の両端部において金属管と固着することとした
ので、従来方法に比して著しく少ない製作所要時間で製
品仕上げを可能にするととともに、高強度で、かつ放熱
効果も満足の行くフィンチューブを提供することを可能
にした。According to the present invention, a spiral groove is formed on the outer surface of a metal tube, and a metal strip is fitted in the spiral groove to form a wound metal tube and a metal strip integrally. , There is no variation in the pitch of the spiral metal strip, and the spiral protrusion provided inside the metal pipe gives a swirling force to the fluid moving inside the metal pipe to cause turbulent flow. By thinning the boundary layer on the inner surface of the tube, it became possible to manufacture a fin tube with a more effective heat dissipation effect. Further, when the spiral metal strip and the metal pipe are integrated, preferably, the metal pipe and the spiral metal strip are fixed to the metal pipe at least at both ends in the longitudinal direction. In addition to enabling the product to be finished in a significantly shorter manufacturing time, it is possible to provide a fin tube with high strength and satisfactory heat dissipation effect.
【図１】本発明の一実施例を示す図であって、（ａ）は
側面図、（ｂ）は正面図である。FIG. 1 is a diagram showing an embodiment of the present invention, in which (a) is a side view and (b) is a front view.
【図２】図１の実施例の側面断面図である。FIG. 2 is a side sectional view of the embodiment of FIG.
【図３】本発明に係る方法を説明する図で、（ａ）は側
面図、（ｂ）は正面図である。3A and 3B are diagrams illustrating a method according to the present invention, in which FIG. 3A is a side view and FIG. 3B is a front view.
【図４】本発明の他の実施例の螺旋状凹溝に沿った部分
断面図である。FIG. 4 is a partial cross-sectional view taken along the spiral groove of another embodiment of the present invention.
【図５】本発明のさらに他の実施例の方法を示す説明図
で、（ａ）は側面図、（ｂ）は（ａ）のＶ−Ｖ線上の部
分断面図である。5A and 5B are explanatory views showing a method of still another embodiment of the present invention, in which FIG. 5A is a side view and FIG. 5B is a partial sectional view taken along line VV of FIG.
【図６】図５の方法の工程を示す拡大断面図で、（ａ）
は図５（ｂ）のＡ−Ａ線上の部分断面図、（ｂ）は図５
（ｂ）のＢ−Ｂ線上の部分断面図、（ｃ）は図５（ｂ）
のＣ−Ｃ線上の部分断面図である。6 is an enlarged cross-sectional view showing the steps of the method of FIG. 5, (a)
5B is a partial sectional view taken along the line AA of FIG. 5B, and FIG.
FIG. 5B is a partial cross-sectional view taken along the line BB of FIG.
3 is a partial cross-sectional view taken along line C-C of FIG.
【図７】本発明のさらに別の実施例を示す図で、（ａ）
は部分波形を示す実施例の一部断面斜視図、（ｂ）は全
体波形を示す実施例の一部断面斜視図である。FIG. 7 is a view showing still another embodiment of the present invention, (a)
Is a partial cross-sectional perspective view of the embodiment showing a partial waveform, and (b) is a partial cross-sectional perspective view of the embodiment showing a whole waveform.
【図８】金属帯材同士を重合せて当該部分に切込みを入
れその部分を外側に曲げて止める方法を示す斜視図であ
る。FIG. 8 is a perspective view showing a method in which metal strips are polymerized with each other and a cut is made in the portion and the portion is bent outward and stopped.
【図９】金属帯材の末端部を金属管上で管軸と平行に折
曲げ、金属管に外嵌した金属バンドで前記折曲げた屈曲
部を挟みスポット溶接して止める方法を示す斜視図であ
る。FIG. 9 is a perspective view showing a method of bending the end portion of the metal strip on the metal pipe in parallel with the pipe axis, and sandwiching the bent portion with a metal band fitted on the metal pipe to fix the spot by spot welding. Is.
１ 金属管 ２ 螺旋状凹溝 ３ 金属帯材 ４ 内周端部 ５ａ 長手方向の一端部 ５ｂ 長手方向の他端部 ６ 螺旋状突出部 ７ ローラ DESCRIPTION OF SYMBOLS 1 Metal tube 2 Spiral concave groove 3 Metal strip 4 Inner peripheral end 5a One end in the longitudinal direction 5b The other end in the longitudinal direction 6 Spiral protrusion 7 Roller
Claims (8)
帯材とによって構成されるフィンチューブにおいて、金
属帯材の内周端部が金属管の外面に形成された螺旋状凹
溝内に嵌合して巻き付けられてなることを特徴とするフ
ィンチューブ。1. A fin tube composed of a metal tube and a metal strip wound around the metal tube, wherein an inner peripheral end portion of the metal strip is fitted into a spiral groove formed on an outer surface of the metal tube. A fin tube characterized by being wound together.
れた外面に対応する内面に螺旋状突出部が形成されてな
ることを特徴とする請求項１記載のフィンチューブ。2. The fin tube according to claim 1, wherein the metal tube has a spiral protrusion formed on an inner surface corresponding to an outer surface on which the spiral groove is formed.
は、少なくとも内周端部が波形に形成されるとともに、
該内周端部において形成された波形の幅が金属管外面に
形成された螺旋状凹溝の溝幅とほぼ等しく形成されてな
ることを特徴とする請求項１または２記載のフィンチュ
ーブ。3. The spirally wound metal strip has at least an inner peripheral end formed into a corrugated shape,
The fin tube according to claim 1 or 2, wherein the width of the corrugation formed at the inner peripheral end is substantially equal to the groove width of the spiral groove formed on the outer surface of the metal tube.
帯材とによって構成されるフィンチューブの製造方法に
おいて、金属管の外面に螺旋状凹溝を形成し、該螺旋状
凹溝に金属帯材の内周端部を嵌合して巻き付けて形成す
ることを特徴とするフィンチューブの製造方法。4. A method of manufacturing a fin tube comprising a metal tube and a metal strip material wound around the metal tube, wherein a spiral groove is formed on an outer surface of the metal tube, and the metal strip is formed in the spiral groove. A method of manufacturing a fin tube, comprising forming an inner peripheral end portion of a material by fitting and winding the material.
螺旋状突出部とを同時に形成することを特徴とする請求
項４記載のフィンチューブの製造方法。5. The method of manufacturing a fin tube according to claim 4, wherein the spiral groove on the outer surface and the spiral protrusion on the inner surface of the metal tube are formed at the same time.
形に形成するとともに、該波形の幅とほぼ等しい溝幅の
螺旋状凹溝を金属管の外面に形成し、該螺旋状凹溝に前
記波形を嵌合して巻き付ける工程を含むことを特徴とす
る請求項４または５項記載のフィンチューブの製造方
法。6. A spiral groove having a groove width substantially equal to the width of the corrugation is formed on the outer surface of the metal tube while at least the inner peripheral end of the metal strip is corrugated. The method for manufacturing a fin tube according to claim 4 or 5, further comprising the step of fitting and winding the corrugated shape on the.
る方向に位置するようにして、該金属管の外面に金属帯
材を螺旋状に巻き付け、該金属帯材の内周端部を前記金
属管の外面に密接し、次いで前記金属帯材の外周端部か
ら前記金属管の中心軸線方向に対して径方向に圧接し、
該圧接により前記金属管の外面には螺旋状に巻き付けら
れた金属帯材によって螺旋状凹溝が、また金属管の内面
には該螺旋状凹溝に対応して螺旋状突出部が形成される
と同時に、前記螺旋状凹溝に金属帯材の内周端部が嵌合
されることを特徴とするフィンチューブの製造方法。7. The metal strip is wound around the outer surface of the metal pipe in a spiral shape so that the plate surface of the metal strip is positioned in a direction orthogonal to the outer surface of the metal pipe, and the inner peripheral end of the metal strip is formed. The portion is in close contact with the outer surface of the metal pipe, and then is pressed from the outer peripheral end of the metal strip in the radial direction with respect to the central axis direction of the metal pipe,
By the pressure contact, a spiral groove is formed on the outer surface of the metal tube by the metal strip wound in a spiral shape, and a spiral protrusion is formed on the inner surface of the metal tube corresponding to the spiral groove. At the same time, the fin tube manufacturing method is characterized in that the inner peripheral end of the metal strip is fitted in the spiral groove.
状に巻き付ける際に、該金属管を回転させて金属帯材を
金属管の外面に圧接することにより該金属管の管壁に塑
性加工に伴う螺旋状凹溝を形成させると同時に該螺旋状
凹溝に金属帯材を嵌合して巻き付けることを特徴とする
請求項７記載のフィンチューブの製造方法。8. When the metal strip is wound around the outer surface of the metal pipe in a spiral shape, the metal pipe is rotated to press the metal strip against the outer surface of the metal pipe to thereby cause the metal wall to come into contact with the pipe wall of the metal pipe. 8. The method of manufacturing a fin tube according to claim 7, wherein the spiral groove is formed by plastic working, and at the same time, a metal strip is fitted and wound around the spiral groove.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20431396A JP3642368B2 (en) | 1995-07-24 | 1996-07-15 | Fin tube and manufacturing method thereof |
| SG9610320A SG87745A1 (en) | 1995-07-24 | 1996-07-23 | Finned tube and method of fabricating same |
| MYPI96003032A MY123744A (en) | 1995-07-24 | 1996-07-23 | Finned tube and method of fabricating same |
| TW85109114A TW313623B (en) | 1995-07-24 | 1996-07-24 |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20833595 | 1995-07-24 | ||
| JP7-208335 | 1995-07-24 | ||
| JP20431396A JP3642368B2 (en) | 1995-07-24 | 1996-07-15 | Fin tube and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09136111A true JPH09136111A (en) | 1997-05-27 |
| JP3642368B2 JP3642368B2 (en) | 2005-04-27 |
Family
ID=26514408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20431396A Expired - Fee Related JP3642368B2 (en) | 1995-07-24 | 1996-07-15 | Fin tube and manufacturing method thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3642368B2 (en) |
| MY (1) | MY123744A (en) |
| SG (1) | SG87745A1 (en) |
| TW (1) | TW313623B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100381922B1 (en) * | 2000-12-21 | 2003-05-01 | 김승학 | cohesive powder transfer screw and method for manufacturing thereof |
| US7093650B2 (en) | 2003-09-01 | 2006-08-22 | Usui Kokusai Sangyo Kaisha, Ltd. | Heat conduction pipe externally covered with fin member |
| KR101252286B1 (en) * | 2012-11-22 | 2013-04-12 | 주식회사 한국번디 | Apparatus for manufacturing turn-fin tube and method of manufacturing turn-fin tube |
| KR101278893B1 (en) * | 2012-11-22 | 2013-06-26 | 주식회사 한국번디 | L type turn-fin tube having circumferential protrusions |
| CN103418633A (en) * | 2012-05-21 | 2013-12-04 | 韩国邦迪株式会社 | Apparatus for manufacturing turn-fin tube and method of manufacturing turn-fin tube |
| JP2014079795A (en) * | 2012-10-18 | 2014-05-08 | Kyodo Alumi Kk | Helical structure and manufacturing method thereof |
| KR102037139B1 (en) * | 2018-10-12 | 2019-10-29 | (주)알투알시스템 | Device of producing fin tube |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960170A (en) * | 1989-01-26 | 1990-10-02 | Carter James I | Finned tube and method of making the same |
| CA2114853C (en) * | 1991-08-03 | 1997-11-18 | Georg Brundermann | Finned tube |
| EP0915313B9 (en) * | 1993-07-21 | 2003-05-02 | Babcock-Hitachi Kabushiki Kaisha | Fin tube heat exchanger |
-
1996
- 1996-07-15 JP JP20431396A patent/JP3642368B2/en not_active Expired - Fee Related
- 1996-07-23 MY MYPI96003032A patent/MY123744A/en unknown
- 1996-07-23 SG SG9610320A patent/SG87745A1/en unknown
- 1996-07-24 TW TW85109114A patent/TW313623B/zh active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100381922B1 (en) * | 2000-12-21 | 2003-05-01 | 김승학 | cohesive powder transfer screw and method for manufacturing thereof |
| US7093650B2 (en) | 2003-09-01 | 2006-08-22 | Usui Kokusai Sangyo Kaisha, Ltd. | Heat conduction pipe externally covered with fin member |
| CN103418633A (en) * | 2012-05-21 | 2013-12-04 | 韩国邦迪株式会社 | Apparatus for manufacturing turn-fin tube and method of manufacturing turn-fin tube |
| JP2014079795A (en) * | 2012-10-18 | 2014-05-08 | Kyodo Alumi Kk | Helical structure and manufacturing method thereof |
| KR101252286B1 (en) * | 2012-11-22 | 2013-04-12 | 주식회사 한국번디 | Apparatus for manufacturing turn-fin tube and method of manufacturing turn-fin tube |
| KR101278893B1 (en) * | 2012-11-22 | 2013-06-26 | 주식회사 한국번디 | L type turn-fin tube having circumferential protrusions |
| KR102037139B1 (en) * | 2018-10-12 | 2019-10-29 | (주)알투알시스템 | Device of producing fin tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3642368B2 (en) | 2005-04-27 |
| SG87745A1 (en) | 2002-04-16 |
| MY123744A (en) | 2006-06-30 |
| TW313623B (en) | 1997-08-21 |
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