JP2004255456A - Manufacturing method of flat tube for heat exchanger - Google Patents

Manufacturing method of flat tube for heat exchanger Download PDF

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Publication number
JP2004255456A
JP2004255456A JP2003052086A JP2003052086A JP2004255456A JP 2004255456 A JP2004255456 A JP 2004255456A JP 2003052086 A JP2003052086 A JP 2003052086A JP 2003052086 A JP2003052086 A JP 2003052086A JP 2004255456 A JP2004255456 A JP 2004255456A
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Japan
Prior art keywords
flat tube
tube
flux
partition
heat exchanger
Prior art date
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Pending
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JP2003052086A
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Japanese (ja)
Inventor
Takashi Igami
多加司 伊神
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Toyo Radiator Co Ltd
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Toyo Radiator Co Ltd
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Filing date
Publication date
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Priority to JP2003052086A priority Critical patent/JP2004255456A/en
Publication of JP2004255456A publication Critical patent/JP2004255456A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a heat exchanger flat tube which is coated with a filler metal on the outer surface only to make the cross section nearly B-shaped, and which enables brazing to be performed improvingly between the tip end of the partitioning part 4 in the center in the width direction of the tube and the inner face of the tube. <P>SOLUTION: The manufacturing method of the flat tube for a heat exchanger is such that a partitioning part 4 is formed by bending in the center in the width direction of a metal strip 12a and that, with both edges away from each other in the width direction, a flux for brazing is stuck to the tip end of the partitioning part 4. Subsequently, both tip ends of a pair of double edges 2a, 2b are abutted on each other, with the tip end of the partitioning part 4 brought into contact with the abutting part to form the flat tube. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状金属板の芯材の外表面にろう材が被覆され、内表面にＭｇ（０．５ 〜０．７５％） の犠牲材が被覆された３層構造のブレージングシートを用い、横断面略Ｂ字状となる偏平チューブを形成するものであって、フラックスを用いてろう付けする熱交換器用偏平チューブの製造方法に関する。
【０００２】
【従来の技術】
芯材の一方の表面にろう材が被覆され、他方の表面に犠牲陽極材が被覆された帯状金属板を、ロールフォーミングによりそのろう材が外表面に位置するようにして、幅方向及び厚み方向に曲折して偏平管状に形成すると共に、その断面の中央位置に仕切部を立上げ形成した断面略Ｂ字状（または略θ状）の熱交換器用偏平チューブ等が知られている（例えば、特許文献１，特許文献２参照。）。
さらに本出願人は、それらを改良した断面略Ｂ字状の偏平チューブを提案している（例えば、特許文献３参照…出願時点で未公開）。
【０００３】
【特許文献１】
特開昭６３−２４２４３２号公報
【特許文献２】
特開２００１−０９１１７８号公報
【特許文献３】
特願２００１−１００１５９号（出願時点で未公開）
【０００４】
これらは何れも偏平チューブの幅方向中央に位置する仕切部の先端とチューブ内面との接合をチューブ外面側のろう材を利用して行うものである。このような偏平チューブにおいてフラックスを有するろう付けを行う場合には、偏平チューブ形成後に、チューブ外面側にフラックスを塗布しそれを仕切部に浸透させ、高温の炉内でろう付け固定する必要がある。
【０００５】
フラックスを必要とするブレージングシートのろう付けは、偏平チューブとフィンとを並列させ、偏平チューブの両端部をチューブプレートのチューブ孔に挿入してコアを組立て、そのコアの外面にフラックスを塗布した後、全体を高温の炉内に挿入してチューブの外表面に被覆されたろう材を溶融し、次いでそれを冷却固化することによって熱交換器コアを完成していた。
【０００６】
【発明が解決しようとする課題】
ところが、横断面略Ｂ字状に形成された偏平チューブは、そのチューブ外面側からフラックスを塗布した場合、そのフラックスが仕切部の隙間に充分に浸透し難いものとなる。この仕切部に充分なるフラックスを供給するため、フラックス塗布量をより多くすると、チューブ外面側に必要以上のフラックスが塗布されることになり、それがろう付け後コア表面を汚損し体裁の悪い熱交換器となる。
【０００７】
また、必要最小限にフラックス塗布量を抑えると、仕切部の内面に充分なフラックスが浸透せず、仕切部とチューブ内面とのろう付け不良を起こすおそれがある。とくに、チューブ内面側にＭｇ成分を有する犠牲陽極材がクラッドされた場合、そのＭｇがろう付け性を悪化させる傾向にある。
そこで本発明は、チューブの外面側に必要最小限のフラックス塗布量でチューブの仕切部のろう付けも充分行い得る熱交換器用偏平チューブの製造方法を提供することを課題とする。
【０００８】
【課題を解決するための手段】
請求項１に記載の本発明は、芯材（１） の外表面のみにろう材（３） が被覆された帯状金属板を、幅方向および厚み方向に曲折して外周が偏平管状に形成されると共に、その継目の両端縁部が内面側に折り返されて一対の二重縁部（２ａ，２ｂ） を構成し、その継目の対向面が内面側に折り返されて二重に形成された仕切部（４） を構成し、それらにより全体が横断面略Ｂ字状となる偏平チューブであって、
前記帯状金属板の幅方向中央に前記仕切部（４） を曲折形成し、その幅方向両縁部を互いに離間した状態で、その仕切部（４） の先端部にろう付け用のフラックスを付着する工程の後に、
一対の前記二重縁部（２ａ，２ｂ） の先端どうしを突き合わせると共に、その突き合わせ部に前記仕切部（４） の先端を接触させて、偏平チューブを形成する熱交換器用偏平チューブの製造方法である。
【０００９】
請求項２に記載の本発明は、請求項１において、
環状の溝部（６） を有する回転ロール（７） の少なくとも下部を、フラックス槽（８） に浸し、その溝部（６） に保持されたフラックスを前記帯状金属板の前記仕切部（４） の先端に付着させることとした熱交換器用偏平チューブの製造方法である。
【００１０】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態につき説明する。
図１は本発明の熱交換器用偏平チューブの製造方法の要部説明図であり、図２は同方法により製造された偏平チューブ２をチューブプレート１１に挿通した状態を示す平面図、図３は図２の ＩＩＩ部拡大図、図４は図２のＩＶ−ＩＶ矢視断面図、図５は同熱交換器の組立て状態を示す正面図てある。
また、図６〜図１６は熱交換器用偏平チューブを多数のフォーミングローラで順に成形する手順の一例を示す要部工程図である。
【００１１】
本発明の熱交換器用偏平チューブは、一例としてアルミニューム製のものからなり、その芯材１の外表面のみにろう材３が被覆され、内面側には図示しない犠牲陽極材が被覆されている。これらの芯材としては、一例として米国アルミニューム協会登録ブレージングシートに記載されているＡ３００３やＡ６９５１その他を用いることができる。
また、ろう材としてはＡ４３４３，Ａ４０４５その他を用いることができる。さらに犠牲陽極材としては、Ａ７０７２その他を用いることができる。
【００１２】
このようなブレージングシートからなる帯状金属板１２ａを図６〜図１３の如く一対のフォーミングローラ１００ 〜１０ｇ ，１１０ 〜１１ｊにより順次幅方向及び厚み方向に曲折する。そして一例として、図１３の状態でその幅方向中央部に形成された仕切部４の先端部にフラックスを付着する。
このフラックス付着工程は、一例として図１の如く行うことができる。即ち、軸線の回りに回転する回転ロール７の下部がフラックス槽８のフラックス９に浸漬される。すると、そのフラックス９が回転ロール７の回転に伴って、その中央に設けられた溝部６内に保持されて上方に持ち上げられ、帯状金属板１２ａの仕切部４の先端にそれが付着する。
【００１３】
この例では、帯状金属板１２ａは図示しないガイドローラ等により紙面の裏面から表面方向に移動する。このとき、仕切部４の先端は回転ロール７の溝部６から僅かに離間している。そしてこの溝部６内に保持されたフラックス９によって、仕切部４の先端部にフラックス９が塗布される。
なお、フラックス槽８内のフラックス９は、公知のもので、それが槽内で粘着剤及びその希釈剤中に混入されている。粘着剤の一例としては、アクリル樹脂系のバインダーを用いることができ、その希釈剤としては機械油や水等を用いることができる。そして適度な粘性を有する液中にバインダーが分散され、それが粘着剤と共に仕切部４の先端に付着される。
【００１４】
次いで、帯状金属板１２ａは図１４〜図１６の如く、さらにその幅方向及び厚み方向に曲折され、一対の二重縁部２ａ，２ｂの先端どうしが突き合わされると共に、その突き合わせ部に仕切部４の先端を接触させ偏平チューブを完成する。
このようにして形成された偏平チューブ２は図２〜図５に示す如く、偏平チューブ２とフィン１４とが交互に並列されると共に、偏平チューブ２の上下両端（下端側を省略）がチューブプレート１１の孔５に挿入されてコアが組立てられる。
【００１５】
このような組立て状態で、コアの外面側からフラックスが塗布される。この場合のフラックスは水等に混合され、それらと共にコアの外面側から付着される。このフラックスの塗布量は、偏平チューブ２とフィン１４及びチューブプレート１１との間のろう付けが充分である必要最小限に抑えられる。
なお、必要に応じてチューブプレート１１にタンク本体１３が被嵌され、タンク本体１３と共にろう付けされることがある。
また、樹脂製のタンク本体を用いる場合には、チューブプレート１１の図示しない環状溝に樹脂タンクの開口縁がＯリングを介して嵌着され、両者間がカシメにより締結固定されるものである。
【００１６】
【発明の作用・効果】
本発明の熱交換器用偏平チューブの製造方法は、帯状金属板１２ａの幅方向中央に仕切部４を曲折し、その両縁部を互いに離間した状態で仕切部４の先端部にろう付け用のフラックス９を付着してから、一対の二重縁部２ａ，２ｂの先端どうしを突き合わせると共に、その突き合わせ部に仕切部４の先端を接触させて偏平チューブ２を形成したから、偏平チューブ２の外面側から浸透し難い位置に予めフラックス９が付着され、その部分のろう付けを確実に行い、偏平チューブの信頼性を向上し得る。
また、予め仕切部４の先端部にフラックスを付着させているので、偏平チューブ２の外面側にその後付着させるフラックス量を必要最小限にすることができ、それによってチューブ外面側が過剰なフラックスで汚れることを防止し体裁の良い熱交換器を提供できる。
【００１７】
上記構成において、回転ロール７を用いそれをフラックス槽８に浸漬すると共に、その溝部６に保持されたフラックスを帯状金属板１２ａの仕切部４の先端部に付着させることができる。この場合には、能率良く連続的に仕切部４の先端にフラックスの付着が可能となる。
【図面の簡単な説明】
【図１】本発明の熱交換器用偏平チューブの製造方法を示す要部説明図。
【図２】同方法により製造された偏平チューブの組立て状態を示す平面説明図。
【図３】図２の ＩＩＩ部拡大図。
【図４】図２のＩＶ−ＩＶ矢視断面図。
【図５】図２のＶ−Ｖ矢視断面図。
【図６】帯状金属板１２ａをフォーミングローラにより幅方向及び厚み方向に曲折して順次偏平管状に曲折する工程の要部説明図。
【図７】同順次偏平管状に曲折する工程の要部説明図。
【図８】同順次偏平管状に曲折する工程の要部説明図。
【図９】同順次偏平管状に曲折する工程の要部説明図。
【図１０】同順次偏平管状に曲折する工程の要部説明図。
【図１１】同順次偏平管状に曲折する工程の要部説明図。
【図１２】同順次偏平管状に曲折する工程の要部説明図。
【図１３】同順次偏平管状に曲折する工程の要部説明図。
【図１４】同順次偏平管状に曲折する工程の要部説明図。
【図１５】同順次偏平管状に曲折する工程の要部説明図。
【図１６】同順次偏平管状に曲折する工程の要部説明図。
【符号の説明】
１ 芯材
２ 偏平チューブ
２ａ，２ｂ 二重縁部
３ ろう材
４ 仕切部
５ 孔
６ 溝部
７ 回転ロール
８ フラックス槽
９ フラックス
１００ 〜１０ｊ，１１０ 〜１１ｊ フォーミングローラ
１１ チューブプレート
１２ａ 帯状金属板
１３ タンク本体
１４ フィン[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention uses a brazing sheet having a three-layer structure in which a brazing material is coated on an outer surface of a core material of a strip-shaped metal plate and a sacrificial material of Mg (0.5 to 0.75%) is coated on an inner surface, The present invention relates to a method of forming a flat tube having a substantially B-shaped cross section, and relates to a method of manufacturing a flat tube for a heat exchanger to be brazed using a flux.
[0002]
[Prior art]
A band-shaped metal plate in which one surface of a core material is coated with a brazing material and the other surface is coated with a sacrificial anode material is roll-formed so that the brazing material is located on the outer surface, in a width direction and a thickness direction. A flat tube for a heat exchanger having a substantially B-shaped (or substantially θ-shaped) cross-section, which is formed by bending into a flat tubular shape and having a partition portion raised at the center of the cross-section, is known (for example, See Patent Documents 1 and 2.)
Further, the present applicant has proposed a flat tube having a substantially B-shaped cross section, which is an improved version thereof (for example, see Patent Document 3; unpublished at the time of filing).
[0003]
[Patent Document 1]
JP-A-63-242432 [Patent Document 2]
JP 2001-009178 A [Patent Document 3]
Japanese Patent Application No. 2001-100159 (not disclosed at the time of filing)
[0004]
In each of these methods, the distal end of the partition located at the center in the width direction of the flat tube and the inner surface of the tube are joined using the brazing material on the outer surface of the tube. When brazing with flux in such a flat tube is performed, after forming the flat tube, it is necessary to apply a flux to the outer surface of the tube, penetrate it into the partition, and braze and fix it in a high-temperature furnace. .
[0005]
After brazing a brazing sheet that requires flux, the flat tubes and fins are arranged in parallel, the ends of the flat tubes are inserted into the tube holes of the tube plate, a core is assembled, and flux is applied to the outer surface of the core. The heat exchanger core was completed by inserting the whole into a high-temperature furnace to melt the brazing material coated on the outer surface of the tube, and then cooling and solidifying it.
[0006]
[Problems to be solved by the invention]
However, when a flat tube having a substantially B-shaped cross section is coated with a flux from the outer surface of the tube, the flux is unlikely to sufficiently penetrate into the gap of the partition. If a sufficient amount of flux is applied to supply sufficient flux to this partition, more flux will be applied to the outer surface of the tube, which will stain the core surface after brazing and cause poor heat appearance. Become an exchanger.
[0007]
Also, if the amount of applied flux is suppressed to the minimum necessary, sufficient flux does not penetrate into the inner surface of the partition portion, and there is a possibility that poor brazing between the partition portion and the inner surface of the tube may occur. In particular, when a sacrificial anode material having an Mg component is clad on the inner surface side of the tube, the Mg tends to deteriorate the brazing property.
Therefore, an object of the present invention is to provide a method of manufacturing a flat tube for a heat exchanger, which can sufficiently braze a partition portion of a tube with a minimum necessary amount of flux applied to the outer surface of the tube.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, a band-shaped metal plate in which only the outer surface of a core material (1) is coated with a brazing material (3) is bent in the width direction and the thickness direction to form a flat tubular outer periphery. In addition, both end edges of the joint are folded back to the inner surface side to form a pair of double edges (2a, 2b), and the opposing surface of the joint is folded back to the inner surface side to form a double formed partition. (4) a flat tube having a substantially B-shaped cross section as a whole.
The partition (4) is bent at the center in the width direction of the strip-shaped metal plate, and a brazing flux is attached to a tip end of the partition (4) in a state where both edges in the width direction are separated from each other. After the process of
A method of manufacturing a flat tube for a heat exchanger for forming a flat tube by bringing the ends of a pair of the double edge portions (2a, 2b) into contact with each other, and bringing the tip of the partition portion (4) into contact with the abutting portion. It is.
[0009]
The present invention described in claim 2 is based on claim 1,
At least the lower part of the rotary roll (7) having the annular groove (6) is immersed in a flux tank (8), and the flux held in the groove (6) is subjected to the tip of the partition (4) of the strip-shaped metal plate. This is a method for producing a flat tube for a heat exchanger which is to be attached to a flat tube.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view of a main part of a method for manufacturing a flat tube for a heat exchanger according to the present invention. FIG. 2 is a plan view showing a state where the flat tube 2 manufactured by the method is inserted into a tube plate 11, and FIG. 2 is an enlarged view of a part III in FIG. 2, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a front view showing an assembled state of the heat exchanger.
6 to 16 are main part process charts showing an example of a procedure for sequentially forming a flat tube for a heat exchanger with a number of forming rollers.
[0011]
The flat tube for a heat exchanger of the present invention is made of aluminum as an example, and the brazing material 3 is coated only on the outer surface of the core material 1 and the sacrificial anode material (not shown) is coated on the inner surface side. . As these core materials, for example, A3003, A6951, and the like described in a brazing sheet registered by the American Aluminum Association can be used.
Further, as the brazing material, A4343, A4045 or the like can be used. Further, A7072 or the like can be used as the sacrificial anode material.
[0012]
Such a metal band plate 12a made of brazing sheet of the pair as shown in FIG. 6 to FIG. 13 forming roller 10 0 to 10 g, are bent sequentially width direction and the thickness direction by 11 0 ~11j. Then, as an example, a flux is attached to the end of the partition 4 formed at the center in the width direction in the state of FIG.
This flux attaching step can be performed, for example, as shown in FIG. That is, the lower part of the rotating roll 7 rotating around the axis is immersed in the flux 9 of the flux tank 8. Then, with the rotation of the rotating roll 7, the flux 9 is held in the groove 6 provided at the center thereof and lifted upward, and adheres to the tip of the partition 4 of the strip-shaped metal plate 12a.
[0013]
In this example, the strip-shaped metal plate 12a is moved from the back side of the paper to the front side by a guide roller or the like (not shown). At this time, the tip of the partition 4 is slightly separated from the groove 6 of the rotating roll 7. The flux 9 held in the groove 6 applies the flux 9 to the tip of the partition 4.
The flux 9 in the flux tank 8 is a known flux, and is mixed in the adhesive and its diluent in the tank. As an example of the adhesive, an acrylic resin-based binder can be used, and as a diluent, mechanical oil, water, or the like can be used. Then, the binder is dispersed in a liquid having an appropriate viscosity, and the binder is attached to the tip of the partition 4 together with the adhesive.
[0014]
Next, the strip-shaped metal plate 12a is further bent in the width direction and the thickness direction as shown in FIGS. 14 to 16 so that the tips of the pair of double edges 2a and 2b abut each other, and the partitioning portion is formed at the abutting portion. 4 are brought into contact with each other to complete a flat tube.
As shown in FIGS. 2 to 5, the flat tube 2 thus formed has the flat tube 2 and the fins 14 alternately arranged in parallel, and the upper and lower ends (the lower end side is omitted) of the flat tube 2. The core is assembled by being inserted into the 11 holes 5.
[0015]
In such an assembled state, the flux is applied from the outer surface side of the core. The flux in this case is mixed with water or the like, and is attached together with the flux from the outer surface side of the core. The amount of the applied flux is minimized so that the brazing between the flat tube 2 and the fins 14 and the tube plate 11 is sufficient.
The tank body 13 may be fitted on the tube plate 11 as necessary and brazed together with the tank body 13.
When a resin tank body is used, an opening edge of the resin tank is fitted into an annular groove (not shown) of the tube plate 11 via an O-ring, and the both are fastened and fixed by caulking.
[0016]
[Action and Effect of the Invention]
In the method for manufacturing a flat tube for a heat exchanger of the present invention, the partition part 4 is bent at the center in the width direction of the strip-shaped metal plate 12a, and brazed to the tip of the partition part 4 with both edges separated from each other. After the flux 9 is attached, the ends of the pair of double edges 2a and 2b are butted against each other, and the end of the partition 4 is brought into contact with the butted portion to form the flat tube 2. The flux 9 is previously attached to a position where the flux hardly penetrates from the outer surface side, and the brazing of the portion is surely performed, so that the reliability of the flat tube can be improved.
In addition, since the flux is previously attached to the distal end portion of the partition portion 4, the amount of the flux to be subsequently applied to the outer surface of the flat tube 2 can be minimized, whereby the outer surface of the tube is contaminated with excessive flux. This prevents a heat exchanger having a good appearance.
[0017]
In the above configuration, the rotary roll 7 is immersed in the flux tank 8 using the rotary roll 7, and the flux held in the groove 6 can be adhered to the tip of the partition 4 of the strip-shaped metal plate 12 a. In this case, the flux can be efficiently and continuously attached to the leading end of the partition portion 4.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a main part showing a method for manufacturing a flat tube for a heat exchanger of the present invention.
FIG. 2 is an explanatory plan view showing an assembled state of the flat tube manufactured by the method.
FIG. 3 is an enlarged view of a part III in FIG. 2;
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;
FIG. 5 is a sectional view taken along the line VV of FIG. 2;
FIG. 6 is an explanatory view of a main part of a process of bending a band-shaped metal plate 12a in a width direction and a thickness direction by a forming roller and sequentially bending it into a flat tubular shape.
FIG. 7 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 8 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 9 is an explanatory view of a main part of a process of sequentially bending the tube into a flat tube.
FIG. 10 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 11 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 12 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 13 is an explanatory view of a main part of a process of sequentially bending the tube into a flat tube.
FIG. 14 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 15 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
FIG. 16 is an explanatory view of a main part of a step of sequentially bending the tube into a flat tube.
[Explanation of symbols]
1 core 2 flat tubes 2a, 2b dual edge 3 brazing material 4 partition portion 5 hole 6 groove 7 rotating roll 8 Flux tank 9 Flux 10 0 ~10j, 11 0 ~11j forming roller 11 tube plates 12a metal band plate 13 Tank body 14 fin

Claims (2)

芯材（１） の外表面のみにろう材（３） が被覆された帯状金属板を、幅方向および厚み方向に曲折して外周が偏平管状に形成されると共に、その継目の両端縁部が内面側に折り返されて一対の二重縁部（２ａ，２ｂ） を構成し、その継目の対向面が内面側に折り返されて二重に形成された仕切部（４） を構成し、それらにより全体が横断面略Ｂ字状となる偏平チューブであって、
前記帯状金属板の幅方向中央に前記仕切部（４） を曲折形成し、その幅方向両縁部を互いに離間した状態で、その仕切部（４） の先端部にろう付け用のフラックスを付着する工程の後に、
一対の前記二重縁部（２ａ，２ｂ） の先端どうしを突き合わせると共に、その突き合わせ部に前記仕切部（４） の先端を接触させて、偏平チューブを形成する熱交換器用偏平チューブの製造方法。A band-shaped metal plate in which only the outer surface of the core material (1) is coated with the brazing material (3) is bent in the width direction and the thickness direction to form a flat outer periphery, and both end edges of the joint are formed. A pair of double edges (2a, 2b) is formed by folding back to the inner surface, and a facing portion of the joint is formed by folding back to the inner surface to form a double formed partition (4). The whole is a flat tube having a substantially B-shaped cross section,
The partition (4) is bent at the center in the width direction of the strip-shaped metal plate, and a brazing flux is attached to a tip end of the partition (4) in a state where both edges in the width direction are separated from each other. After the process of
A method of manufacturing a flat tube for a heat exchanger for forming a flat tube by bringing the ends of a pair of the double edge portions (2a, 2b) into contact with each other, and bringing the tip of the partition portion (4) into contact with the abutting portion. . 請求項１において、
環状の溝部（６） を有する回転ロール（７） の少なくとも下部を、フラックス槽（８） に浸し、その溝部（６） に保持されたフラックスを前記帯状金属板の前記仕切部（４） の先端に付着させることとした熱交換器用偏平チューブの製造方法。In claim 1,
At least the lower part of the rotary roll (7) having the annular groove (6) is immersed in a flux tank (8), and the flux held in the groove (6) is subjected to the tip of the partition (4) of the strip-shaped metal plate. A method for producing a flat tube for a heat exchanger, which is to be adhered to a tube.
JP2003052086A 2003-02-27 2003-02-27 Manufacturing method of flat tube for heat exchanger Pending JP2004255456A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093113A1 (en) 2004-03-25 2005-10-06 Topy Kogyo Kabushiki Kaisha Metallic glass laminate, process for producing the same and use thereof
GB2486671A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A Heat Exchanger, a Tube for a Heat Exchanger, a Method of making a tube for a Heat Exchanger and a Method of Making a Heat Exchanger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093113A1 (en) 2004-03-25 2005-10-06 Topy Kogyo Kabushiki Kaisha Metallic glass laminate, process for producing the same and use thereof
GB2486671A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A Heat Exchanger, a Tube for a Heat Exchanger, a Method of making a tube for a Heat Exchanger and a Method of Making a Heat Exchanger
GB2486788A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A heat exchanger, a tube for a heat exchanger, a method of making a tube for a heat exchanger and a method of making a heat exchanger
GB2486788B (en) * 2010-12-22 2016-12-07 Denso Marston Ltd A heat exchanger,a tube for a heat exchanger,a method of making a tube for a heat exchanger and a method of making a heat exchanger

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