JP3402234B2 - Aluminum tube with inner groove and method of manufacturing the same - Google Patents
Aluminum tube with inner groove and method of manufacturing the sameInfo
- Publication number
- JP3402234B2 JP3402234B2 JP00398999A JP398999A JP3402234B2 JP 3402234 B2 JP3402234 B2 JP 3402234B2 JP 00398999 A JP00398999 A JP 00398999A JP 398999 A JP398999 A JP 398999A JP 3402234 B2 JP3402234 B2 JP 3402234B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- aluminum
- aluminum tube
- groove
- oxide film
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内面溝付アルミニ
ウム管及びその製造方法に係り、特に、熱交換器の伝熱
管用内面溝付アルミニウム管及び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 inner grooved aluminum tube and a manufacturing method thereof, and more particularly to an inner grooved aluminum tube for a heat transfer tube of a heat exchanger and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】熱交換器の伝熱管として用いられる内面
溝付アルミニウム管は、以下の工程を経て熱交換器に組
み込まれる。2. Description of the Related Art An aluminum tube with an inner groove used as a heat transfer tube for a heat exchanger is incorporated into the heat exchanger through the following steps.
【０００３】先ず、図３に示すように、伝熱管挿通孔３
２が形成された複数枚の金属プレート３１を所定の間隔
Ｔを有して平行に配置した後、その伝熱管挿通孔３２に
内面溝付アルミニウム管３３を挿通させる。この時、伝
熱管挿通孔３２と内面溝付アルミニウム管３３の間には
隙間ｔが存在する。First, as shown in FIG. 3, the heat transfer tube insertion hole 3 is formed.
After arranging a plurality of metal plates 31 on which 2 is formed at a predetermined interval T in parallel, an aluminum tube 33 with an inner surface groove is inserted into the heat transfer tube insertion hole 32. At this time, a gap t exists between the heat transfer tube insertion hole 32 and the inner grooved aluminum tube 33.
【０００４】次に、内面溝付アルミニウム管３３の最内
径Ｄ1 よりも大きな外径Ｄ2 を有し、かつ、ロッド３５
の先端に取付けられたマンドレル３４を、内面溝付アル
ミニウム管３３の一端側（図３中では右側）から油圧等
の手段で押込む。Next, the rod 35 has an outer diameter D 2 larger than the innermost diameter D 1 of the inner grooved aluminum tube 33.
The mandrel 34 attached to the tip end of the inner surface of the inner surface grooved aluminum tube 33 is pushed in from one end side (right side in FIG. 3) by means of hydraulic pressure or the like.
【０００５】マンドレル３４を内面溝付アルミニウム管
３３内に押込んで行くことによって、内面溝付アルミニ
ウム管３３が拡径され、伝熱管挿通孔３２と内面溝付ア
ルミニウム管３３が密着し、内面溝付アルミニウム管３
３の熱交換器への組み込みが完了する。By pushing the mandrel 34 into the aluminum tube 33 with inner groove, the inner tube 33 with inner groove is expanded in diameter, and the heat transfer tube insertion hole 32 and the aluminum tube 33 with inner groove come into close contact with each other. Aluminum tube 3
The incorporation of No. 3 into the heat exchanger is complete.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、内面溝
付アルミニウム管３３は、大気中で自然酸化されて表面
に酸化被膜層が形成されているが、その酸化被膜層は緻
密で化学的に安定しているため、酸化被膜層の層厚があ
る一定（１μｍ程度）以上に達した時点で酸化はストッ
プしてしまう。However, the inner grooved aluminum tube 33 is naturally oxidized in the atmosphere to form an oxide film layer on the surface. The oxide film layer is dense and chemically stable. Therefore, the oxidation stops when the layer thickness of the oxide film layer reaches a certain level (about 1 μm) or more.
【０００７】このため、マンドレル３４を内面溝付アル
ミニウム管３３内に押込んで行くことにより、管内面に
おけるマンドレル押付け部において酸化被膜層が容易に
割れ（剥離し）、活性なアルミニウムの新生面が露出す
る。Therefore, by pushing the mandrel 34 into the aluminum tube 33 having the inner surface groove, the oxide film layer is easily cracked (peeled) at the mandrel pressing portion on the inner surface of the tube, and the new surface of active aluminum is exposed. .
【０００８】よって、内面溝付アルミニウム管３３の内
面とマンドレル３４との焼き付きが生じ、結果として、
内面溝付アルミニウム管３３の内面とマンドレル３４と
の摩擦抵抗が増大して管内面の溝が潰れたり、マンドレ
ル３４のそれ以上の押込みが不可能になるといった問題
があった。Therefore, seizure occurs between the inner surface of the aluminum tube 33 having inner grooves and the mandrel 34, and as a result,
There is a problem that the frictional resistance between the inner surface of the aluminum tube 33 having an inner surface groove and the mandrel 34 increases, the groove on the inner surface of the tube is crushed, and the mandrel 34 cannot be pushed further.
【０００９】そこで本発明は、上記課題を解決し、拡径
時におけるアルミニウム新生面の露出が殆どない内面溝
付アルミニウム管及びその製造方法を提供することにあ
る。SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and provide an aluminum tube with an inner surface groove in which a newly formed aluminum surface is hardly exposed when the diameter is expanded, and a method for manufacturing the same.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に請求項１の発明は、熱交換器の伝熱管に用いられ、管
内面に多数の溝が形成された内面溝付アルミニウム管に
おいて、上記管内表面に層厚が５μｍ以上の酸化被膜層
を有するものである。In order to solve the above-mentioned problems, the invention of claim 1 is an aluminum tube with an inner surface groove used for a heat transfer tube of a heat exchanger and having a large number of grooves formed on the inner surface of the tube. The inner surface of the tube has an oxide film layer having a layer thickness of 5 μm or more.
【００１１】請求項２の発明は、内面に多数の溝を有し
たアルミニウム管を押出成形した後、少なくともその内
面溝付アルミニウム管の内表面に、層厚が５μｍ以上の
酸化被膜層を形成するものである。According to a second aspect of the present invention, an aluminum tube having a large number of grooves on its inner surface is extruded, and then an oxide film layer having a thickness of 5 μm or more is formed on at least the inner surface of the grooved aluminum tube. It is a thing.
【００１２】請求項３の発明は、片面に多数の溝を有し
たアルミニウム条を形成した後、少なくともそのアルミ
ニウム条の溝形成面に、層厚が５μｍ以上の酸化被膜層
を形成した後、そのアルミニウム条の溝形成面を内側に
して管状に丸め、その突合せ部を金属的に接合するもの
である。According to the third aspect of the present invention, after forming an aluminum strip having a large number of grooves on one surface, an oxide film layer having a layer thickness of 5 μm or more is formed on at least the groove forming surface of the aluminum strip, The aluminum strip is rolled into a tubular shape with the groove forming surface facing inward, and the butted portions are metallically joined.
【００１３】請求項４の発明は、上記酸化被膜層を、陽
極酸化又は酸化雰囲気中での高温加熱により形成する請
求項２又は請求項３記載の内面溝付アルミニウム管の製
造方法である。A fourth aspect of the present invention is the method for producing an aluminum tube with an inner surface groove according to the second or third aspect, wherein the oxide film layer is formed by anodic oxidation or high temperature heating in an oxidizing atmosphere.
【００１４】以上の構成・方法によれば、内面溝付アル
ミニウム管の内表面に、十分な厚さ（層厚が５μｍ以
上）の酸化被膜層を形成しているため、管拡径時にマン
ドレルを管内に押込んでも、管内面におけるマンドレル
押付け部において酸化被膜層が容易に割れることはな
く、アルミニウム新生面の露出が殆どなくなる。According to the above structure and method, since the oxide film layer having a sufficient thickness (layer thickness of 5 μm or more) is formed on the inner surface of the aluminum tube with the inner surface groove, the mandrel is expanded when the tube is expanded. Even if it is pushed into the pipe, the oxide film layer is not easily cracked at the mandrel pressing portion on the pipe inner surface, and the new aluminum surface is hardly exposed.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
【００１６】本発明の内面溝付アルミニウム管の横断面
図を図１に示す。ここで、図１（ｂ）は、図１（ａ）の
部分拡大図である。FIG. 1 shows a cross-sectional view of the aluminum tube with an inner groove according to the present invention. Here, FIG. 1B is a partially enlarged view of FIG.
【００１７】図１（ａ），（ｂ）に示すように、本発明
の内面溝付アルミニウム管１は、管内面に多数の溝２が
形成され、かつ、管内表面に層厚が５μｍ以上の酸化被
膜層３が形成されたものである。As shown in FIGS. 1 (a) and 1 (b), an aluminum tube 1 with an inner groove of the present invention has a large number of grooves 2 formed on the inner surface of the tube and has a layer thickness of 5 μm or more on the inner surface of the tube. The oxide film layer 3 is formed.
【００１８】内面溝付アルミニウム管１のＡｌ材として
は、特に限定するものではなく、工業用純ＡｌまたはＡ
ｌ合金などが挙げられる。The Al material for the inner grooved aluminum tube 1 is not particularly limited, and it is pure Al or A for industrial use.
1 alloy and the like.
【００１９】すなわち、本発明の内面溝付アルミニウム
管１によれば、管内表面に十分な厚さの酸化被膜層３が
形成されているため、図３に示したように熱交換器への
組み込みの際、管拡径のためにマンドレル３４を管内に
押込んでも、管内面におけるマンドレル３４の押付け部
において酸化被膜層３が容易に割れることはなく、管内
面においてアルミニウム新生面の露出が殆どない。That is, according to the inner grooved aluminum tube 1 of the present invention, since the oxide film layer 3 having a sufficient thickness is formed on the inner surface of the tube, it is incorporated in the heat exchanger as shown in FIG. At this time, even if the mandrel 34 is pushed into the pipe for expanding the diameter of the pipe, the oxide film layer 3 is not easily cracked at the pressing portion of the mandrel 34 on the inner surface of the pipe, and the new aluminum surface is hardly exposed on the inner surface of the pipe.
【００２０】また、管内面においてアルミニウム新生面
の露出が殆どないため、管拡径時における管内面とマン
ドレル３４との焼き付きが生じず、管内面とマンドレル
３４との摩擦抵抗が良好に保たれ、結果として、管内面
の溝２の潰れもなく、良好にマンドレル３４の押し込み
を行うことができる。Further, since there is almost no exposed new aluminum surface on the inner surface of the tube, seizure between the inner surface of the tube and the mandrel 34 does not occur when the diameter of the tube is expanded, and the frictional resistance between the inner surface of the tube and the mandrel 34 is kept good. As a result, the mandrel 34 can be satisfactorily pushed in without crushing the groove 2 on the inner surface of the pipe.
【００２１】次に、本発明の内面溝付アルミニウム管１
の製造方法を説明する。Next, the aluminum tube 1 with an inner surface groove of the present invention
The manufacturing method of will be described.
【００２２】本発明の内面溝付アルミニウム管１の製造
方法の模式図を図２に示す。FIG. 2 shows a schematic view of a method for manufacturing the aluminum tube 1 with an inner groove according to the present invention.
【００２３】先ず、内面に多数の溝を有したアルミニウ
ム管２０を押出成形する。その後、アルミニウム管２０
の外表面に、酸化被膜層の形成を防ぐための前処理を施
す。次に、図２に示すように、電解浴槽２１内の硫酸浴
２２中に、直流電源２４の陽極（＋）に接続された内面
溝付アルミニウム管２０を浸漬すると共に、直流電源２
４の陰極（−）にそれぞれ接続された電極（図２中では
２本）２３ａ，２３ｂを浸漬する。First, the aluminum tube 20 having a large number of grooves on its inner surface is extruded. Then the aluminum tube 20
The outer surface of the is subjected to a pretreatment to prevent the formation of an oxide film layer. Next, as shown in FIG. 2, the inner grooved aluminum tube 20 connected to the anode (+) of the DC power source 24 is immersed in the sulfuric acid bath 22 in the electrolytic bath 21, and the DC power source 2
The electrodes (two in FIG. 2) 23a and 23b respectively connected to the cathode (−) of No. 4 are immersed.
【００２４】最後に、直流電源２４の電源をＯＮにして
陽極酸化処理を行い、アルミニウム管２０の内表面に、
図１に示した酸化被膜層（例えば、層厚２０μｍ）３を
形成し、本発明の内面溝付アルミニウム管１を得る。Finally, the DC power source 24 is turned on to perform anodizing treatment, and the inner surface of the aluminum tube 20 is
The oxide film layer (for example, a layer thickness of 20 μm) 3 shown in FIG. 1 is formed to obtain the aluminum tube 1 with an inner groove of the present invention.
【００２５】ここで、酸化被膜層３の層厚は、陽極酸化
処理の処理条件により任意に選択されるが、製造コスト
の兼ね合いから、例えば、硫酸浴２２中の硫酸の電解組
成が１０〜２０％、硫酸浴２２の温度が２０〜３０℃、
電流密度が１〜２Ａ／ｍ2 、電圧が１０〜２０Ｖ、処理
時間が０．６〜１．８ｋｓの陽極酸化処理を行い、５〜
３０μｍの層厚の酸化被膜層３を形成するのが好まし
い。Here, the layer thickness of the oxide film layer 3 is arbitrarily selected depending on the treatment conditions of the anodic oxidation treatment, but from the viewpoint of manufacturing cost, for example, the electrolytic composition of sulfuric acid in the sulfuric acid bath 22 is 10 to 20. %, The temperature of the sulfuric acid bath 22 is 20 to 30 ° C.,
The current density is 1 to 2 A / m 2 , the voltage is 10 to 20 V, and the treatment time is 0.6 to 1.8 ks.
It is preferable to form the oxide film layer 3 having a layer thickness of 30 μm.
【００２６】陽極酸化処理の電解浴としては、硫酸に特
に限定するものではなく、その他に、シュウ酸、クロム
酸、ホウ酸などの酸性電解浴、アルカリ性電解浴、およ
び非水性電解浴などが挙げられる。The electrolytic bath for the anodic oxidation treatment is not particularly limited to sulfuric acid, and other examples include acidic electrolytic baths such as oxalic acid, chromic acid and boric acid, alkaline electrolytic baths, and non-aqueous electrolytic baths. To be
【００２７】また、酸化被膜層３の形成方法は、陽極酸
化処理法に特に限定するものではなく、その他に、酸化
雰囲気中における高温加熱法が挙げられる。The method for forming the oxide film layer 3 is not particularly limited to the anodizing method, but other methods include a high temperature heating method in an oxidizing atmosphere.
【００２８】さらに、酸化被膜層３の形成は、内面溝付
アルミニウム管１の内表面だけに限定するものではな
く、管外表面にも形成してよい。この場合、管外径が若
干大きくなるということを考慮する必要がある。Further, the formation of the oxide film layer 3 is not limited to the inner surface of the inner grooved aluminum tube 1, but may be formed on the outer surface of the tube. In this case, it is necessary to consider that the outer diameter of the pipe becomes slightly larger.
【００２９】すなわち、本発明の内面溝付アルミニウム
管１の製造方法によれば、自然酸化被膜層と比較して層
厚が格段に厚い酸化被膜層３を、管内表面に形成するこ
とができる。That is, according to the method of manufacturing the aluminum tube 1 with inner surface groove of the present invention, the oxide film layer 3 having a remarkably thicker layer thickness than the natural oxide film layer can be formed on the inner surface of the pipe.
【００３０】次に、本発明の他の実施の形態を説明す
る。Next, another embodiment of the present invention will be described.
【００３１】本発明の内面溝付アルミニウム管１の製造
方法は、図２に示したように、酸化被膜層３を陽極酸化
処理法によって形成するものであった。As shown in FIG. 2, the method for manufacturing the inner grooved aluminum tube 1 of the present invention was to form the oxide film layer 3 by an anodic oxidation treatment method.
【００３２】これに対して、第１の実施の形態の内面溝
付アルミニウム管の製造方法は、先ず、片面に多数の溝
を有したアルミニウム条を形成する。その後、アルミニ
ウム条の他面に、酸化被膜層の形成を防ぐための前処理
を施す。On the other hand, in the method of manufacturing an aluminum tube with an inner groove according to the first embodiment, first, an aluminum strip having a large number of grooves on one surface is formed. Thereafter, the other surface of the aluminum strip is subjected to a pretreatment for preventing the formation of an oxide film layer.
【００３３】次に、電解浴槽内の硫酸浴中に、直流電源
の陽極（＋）に接続されたアルミニウム条を浸漬すると
共に、直流電源の陰極（−）に接続された電極を浸漬す
る。Next, the aluminum strip connected to the anode (+) of the DC power supply and the electrode connected to the cathode (-) of the DC power supply are immersed in a sulfuric acid bath in the electrolytic bath.
【００３４】次に、直流電源の電源をＯＮにして陽極酸
化処理を行い、アルミニウム条の溝形成面に酸化被膜層
を形成する。Next, the direct current power supply is turned on and anodization is performed to form an oxide film layer on the groove forming surface of the aluminum strip.
【００３５】最後に、そのアルミニウム条の溝形成面を
内側にして管状に丸め、その突合せ部を金属的に接合し
て本実施の形態の内面溝付アルミニウム管を得る。Finally, the grooved surface of the aluminum strip is rolled into a tubular shape, and the butted portions are metallically joined to each other to obtain the aluminum tube with an inner groove of this embodiment.
【００３６】酸化被膜層の形成はアルミニウム条の溝形
成面だけに限定するものではなく、アルミニウム条の他
面にも形成してよい。この場合も、本発明の内面溝付ア
ルミニウム管の時と同様に、管外径が若干大きくなると
いうことを考慮する必要がある。The formation of the oxide film layer is not limited to the groove forming surface of the aluminum strip, but may be formed on the other surface of the aluminum strip. In this case as well, it is necessary to consider that the outer diameter of the pipe is slightly larger, as in the case of the aluminum pipe with inner surface groove of the present invention.
【００３７】アルミニウム条の突合せ部の金属的接合方
法は、特に限定するものではなく、例えば、溶融溶接、
圧接（広義の圧接）、ロウ付などが挙げられる。The metal joining method of the abutting portions of the aluminum strips is not particularly limited, and for example, melt welding,
Pressure welding (broad pressure welding), brazing, etc. are mentioned.
【００３８】尚、本実施の形態の内面溝付アルミニウム
管の製造方法においても、本発明の内面溝付アルミニウ
ム管の製造方法と同様の効果を有することは言うまでも
ない。Needless to say, the method of manufacturing an aluminum tube with an inner groove of this embodiment also has the same effects as the method of manufacturing an aluminum tube with an inner groove of the present invention.
【００３９】[0039]
【発明の効果】以上要するに本発明によれば、管内表面
に十分な厚さの酸化被膜層を形成することで、熱交換器
への組み込みの際、管拡径のためにマンドレルを管内に
押込んでも、管内面におけるマンドレルの押付け部にお
いて酸化被膜層が容易に割れることはなく、管内面にお
いてアルミニウム新生面の露出が殆どないという優れた
効果を発揮する。In summary, according to the present invention, by forming an oxide film layer having a sufficient thickness on the inner surface of the pipe, the mandrel is pushed into the pipe for expanding the pipe when the pipe is expanded in the heat exchanger. Even if it is inserted, the oxide film layer is not easily cracked at the mandrel pressing portion on the inner surface of the pipe, and the newly-formed aluminum surface is hardly exposed on the inner surface of the pipe.
【図１】図１（ａ）は、本発明の内面溝付アルミニウム
管の横断面図であり、図１（ｂ）は、図１（ａ）の部分
拡大図である。1 (a) is a cross-sectional view of an aluminum tube with an inner surface groove of the present invention, and FIG. 1 (b) is a partially enlarged view of FIG. 1 (a).
【図２】本発明の内面溝付アルミニウム管の製造方法の
模式図である。FIG. 2 is a schematic view of a method for manufacturing an aluminum tube with an inner groove according to the present invention.
【図３】内面溝付アルミニウム管を熱交換器に組み込む
際の模式図である。FIG. 3 is a schematic view when an aluminum tube with an inner surface groove is incorporated in a heat exchanger.
１ 内面溝付アルミニウム管 ２ 溝 ３ 酸化被膜層 ２０ アルミニウム管 1 Aluminum tube with internal groove 2 grooves 3 Oxide film layer 20 Aluminum tube
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−136178（ＪＰ，Ａ) 特開 昭58−73795（ＪＰ，Ａ) 特開 平５−322477（ＪＰ，Ａ) 特開 平３−207997（ＪＰ，Ａ) 特開 平10−246589（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F28F 1/40 F28F 19/02 F28F 21/08 F28F 1/32 F28F 13/18 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-8-136178 (JP, A) JP-A-58-73795 (JP, A) JP-A-5-322477 (JP, A) JP-A-3- 207997 (JP, A) JP 10-246589 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F28F 1/40 F28F 19/02 F28F 21/08 F28F 1/32 F28F 13/18
Claims (4)
多数の溝が形成された内面溝付アルミニウム管におい
て、上記管内表面に層厚が５μｍ以上の酸化被膜層を有
することを特徴とする内面溝付アルミニウム管。1. An aluminum tube with an inner surface groove used for a heat transfer tube of a heat exchanger and having a large number of grooves formed on the inner surface of the tube, wherein the inner surface of the tube has an oxide film layer with a layer thickness of 5 μm or more. Aluminum tube with internal groove.
を押出成形した後、少なくともその内面溝付アルミニウ
ム管の内表面に、層厚が５μｍ以上の酸化被膜層を形成
することを特徴とする内面溝付アルミニウム管の製造方
法。2. An aluminum tube having a large number of grooves on its inner surface is extruded, and then an oxide film layer having a layer thickness of 5 μm or more is formed on at least the inner surface of the inner grooved aluminum tube. Manufacturing method of aluminum tube with inner groove.
を形成した後、少なくともそのアルミニウム条の溝形成
面に、層厚が５μｍ以上の酸化被膜層を形成した後、そ
のアルミニウム条の溝形成面を内側にして管状に丸め、
その突合せ部を金属的に接合することを特徴とする内面
溝付アルミニウム管の製造方法。3. After forming an aluminum strip having a large number of grooves on one side, forming an oxide film layer having a layer thickness of 5 μm or more on at least the groove forming surface of the aluminum strip, and then forming the groove of the aluminum strip. Roll it into a tube with the surface inside,
A method for manufacturing an aluminum tube with an inner surface groove, characterized in that the abutting portions are metallically joined.
囲気中での高温加熱により形成する請求項２又は請求項
３記載の内面溝付アルミニウム管の製造方法。4. The method for producing an inner grooved aluminum tube according to claim 2, wherein the oxide film layer is formed by anodic oxidation or high temperature heating in an oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00398999A JP3402234B2 (en) | 1999-01-11 | 1999-01-11 | Aluminum tube with inner groove and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00398999A JP3402234B2 (en) | 1999-01-11 | 1999-01-11 | Aluminum tube with inner groove and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000205782A JP2000205782A (en) | 2000-07-28 |
| JP3402234B2 true JP3402234B2 (en) | 2003-05-06 |
Family
ID=11572440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00398999A Expired - Fee Related JP3402234B2 (en) | 1999-01-11 | 1999-01-11 | Aluminum tube with inner groove and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3402234B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5089232B2 (en) * | 2007-04-20 | 2012-12-05 | 古河スカイ株式会社 | Method for producing three-layer clad aluminum tube and aluminum internally grooved tube |
| US8037699B2 (en) | 2008-04-24 | 2011-10-18 | Mitsubishi Electric Corporation | Heat exchanger and air conditioner using the same |
| JP6154610B2 (en) * | 2010-07-13 | 2017-06-28 | 株式会社Uacj | Aluminum alloy inner surface grooved heat transfer tube |
| JP4854803B1 (en) * | 2010-10-15 | 2012-01-18 | 株式会社 エコファクトリー | Heat exchanger sealing structure and heat exchanger |
| JP5264944B2 (en) * | 2011-03-01 | 2013-08-14 | 三菱電機株式会社 | Heat exchanger manufacturing method, heat exchanger, and refrigeration cycle apparatus |
| JP2017101866A (en) * | 2015-12-01 | 2017-06-08 | 株式会社デンソー | Heat exchanger and manufacturing method thereof |
-
1999
- 1999-01-11 JP JP00398999A patent/JP3402234B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000205782A (en) | 2000-07-28 |
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