JPH10197175A - Extruded multi-hole aluminum tube for heat exchanger and manufacture thereof - Google Patents
Extruded multi-hole aluminum tube for heat exchanger and manufacture thereofInfo
- Publication number
- JPH10197175A JPH10197175A JP1197397A JP1197397A JPH10197175A JP H10197175 A JPH10197175 A JP H10197175A JP 1197397 A JP1197397 A JP 1197397A JP 1197397 A JP1197397 A JP 1197397A JP H10197175 A JPH10197175 A JP H10197175A
- Authority
- JP
- Japan
- Prior art keywords
- hole tube
- aluminum
- material layer
- brazing material
- tube
- 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.)
- Pending
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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the 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
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱交換器用アルミ
ニウム（アルミニウム合金を含む、以下同じ）押出多穴
管、とくに、アルミニウムフィン材とろう付け接合され
るろう付熱交換器用アルミニウム押出多穴管、およびそ
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum (including an aluminum alloy, hereinafter the same) extruded multi-hole tube for a heat exchanger, and more particularly to an aluminum extruded multi-hole tube for a brazed heat exchanger which is brazed to an aluminum fin material. And a method for producing the same.
【０００２】[0002]
【従来の技術】アルミニウム製熱交換器は、従来、図５
に示すように、アルミニウムの偏平多穴管からなるチュ
ーブ材１に、Ａｌ−Ｓｉ系合金などからなるろう材層を
クラッドしたブレージングシートから構成されるアルミ
ニウムフィン材２を組付け、フラックスろう付け、また
は真空ろう付けあるいは雰囲気ろう付けなどのフラック
スレスろう付けを行い一体とすることにより組立てられ
ている。2. Description of the Related Art Aluminum heat exchangers are conventionally known as shown in FIG.
As shown in FIG. 2, an aluminum fin material 2 composed of a brazing sheet clad with a brazing material layer made of an Al—Si alloy or the like is attached to a tube material 1 composed of a flat multi-hole aluminum tube, and flux brazing is performed. Alternatively, it is assembled by performing fluxless brazing such as vacuum brazing or atmosphere brazing.
【０００３】近年、アルミニウム製熱交換器の軽量化の
観点から、アルミニウムフィン材の薄肉化が要請されて
おり、この場合、従来とは逆に、フィン材をブレージン
グシートからベア材に変え、チューブ材として、ろう材
をクラッドしたものを使用することができれば、フィン
材の一層の薄肉化が期待できる。しかしながら、アルミ
ニウムの偏平多穴管からなるチューブ材にろう材層を工
業的規模で安定且つ安価に被覆する方法は確立されてい
ないのが現状である。In recent years, from the viewpoint of reducing the weight of an aluminum heat exchanger, it has been required to reduce the thickness of an aluminum fin material. In this case, the fin material is changed from a brazing sheet to a bare material, and If a brazing material clad can be used as the material, further thinning of the fin material can be expected. However, at present, no method has been established for coating a brazing material layer on an industrial scale stably and inexpensively on a tube made of a flat multi-hole aluminum tube.
【０００４】チューブ材へのろう材被覆に適用し得る方
法として、アルミニウム材をフラックスと珪素金属粉末
の混合物のスラリー中に浸漬して、加熱、乾燥させ、当
該混合物をアルミニウム材の表面に塗布したものを組合
わせて、ろう付け炉内で加熱し、接合面にＡｌ−Ｓｉ系
の溶融ろうを形成させて、ろう付けを行う方法（特表平
6-504485号公報、特開平7-308795号公報) なども提案さ
れているが、これらの方法は塗布または被覆作業が面倒
でコスト高となるとともに均一な被覆が難しく、Ｓｉ粉
末の密着性も不十分となり易いため、均一且つ安定した
ろう付け接合が行い難いという難点がある。[0004] As a method applicable to brazing of a tube material, an aluminum material is immersed in a slurry of a mixture of a flux and silicon metal powder, heated and dried, and the mixture is applied to the surface of the aluminum material. A method of brazing by combining the materials and heating in a brazing furnace to form an Al-Si-based molten braze on the joint surface (Japanese Unexamined Patent Publication No.
6-504485, JP-A-7-308795) and the like are also proposed, but these methods are cumbersome and costly coating or coating work is difficult and uniform coating is difficult, the adhesion of Si powder also Since it tends to be insufficient, there is a problem that it is difficult to perform uniform and stable brazing.
【０００５】発明者らは、先に、偏平形状のアルミニウ
ム多穴管に、押出加工時にろう材層を均一に被覆する方
法として、アルミニウム押出多穴管の押出成形におい
て、押出ダイスの後面に位置するコンテナ内に、図４に
示すように、円錐形状の先端部７をそなえた多穴管構成
アルミニウム材６を、該円錐形状の先端部７に嵌着する
底部９を有する円筒容器状のろう材層構成アルミニウム
材８を嵌め合わせてなる押出用ビレット１０を、前記円
錐形状の先端部７が押出ダイス側に位置するよう装入
し、押出加工することにより多穴管の外表面にろう材層
を被覆する方法を提案した。As a method of uniformly coating a brazing material layer on a flat aluminum multi-hole tube at the time of extrusion processing, the present inventors have proposed a method of extruding an aluminum extruded multi-hole tube at a position behind the extrusion die. As shown in FIG. 4, a multi-well tube-forming aluminum material 6 having a conical tip 7 is inserted into a container having a bottom 9 fitted into the conical tip 7, as shown in FIG. An extrusion billet 10 in which a material layer constituting aluminum material 8 is fitted is inserted so that the conical tip 7 is located on the extrusion die side, and is extruded to form a brazing material on the outer surface of the multi-hole tube. A method of coating the layer was proposed.
【０００６】この方法においては、図３に示すように、
偏平形状のアルミニウム多穴管１の外表面に均一なろう
材層５を被覆することが可能となり、アルミニウム多穴
管１の平坦部３、４に被覆されたろう材層５、５を介し
てフィン材２をろう付けすることにより熱交換器要素を
組立てることができるが、ろう材層が被覆されたアルミ
ニウム多穴管の両端縁部１４、１４にろう材層５の巻き
込み部１１、１１が生じ易い。このろう材層巻き込み部
１１、１１は、フィン材のろう付け接合後もろう材で満
たされているため、熱交換器の使用時に直ちに漏洩に到
ることは少ないが、熱交換器が腐食環境下に置かれた場
合、この部分が先に腐食し流体の漏洩を生じるおそれが
ある。In this method, as shown in FIG.
The outer surface of the flat aluminum multi-hole tube 1 can be coated with a uniform brazing material layer 5, and the fins are interposed between the flat portions 3, 4 of the aluminum multi-hole tube 1 via the brazing material layers 5, 5. The heat exchanger element can be assembled by brazing the brazing material 2, but entrainment portions 11, 11 of the brazing material layer 5 are formed on both end edges 14, 14 of the aluminum multi-hole tube coated with the brazing material layer. easy. Since the brazing material layer entrained portions 11 and 11 are filled with the brazing material even after the brazing of the fin material, it is unlikely that leakage will occur immediately when the heat exchanger is used. If placed underneath, this area may corrode first and cause fluid leakage.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、アルミニウ
ム製熱交換器の流体通路を構成する偏平形状のアルミニ
ウム押出多穴管であって、アルミニウムフィンなどの他
のアルミニウム部材と接合する多穴管の外表面にろう材
層を被覆したアルミニウム押出多穴管における上記の問
題点を解消するためになされたものであり、その目的
は、均一なろう材層を形成して安定したろう付け接合を
行うことを可能とし、ろう付け後の耐食性、熱交換性能
に優れた熱交換器用アルミニウム押出多穴管およびその
製造方法を提供することにある。SUMMARY OF THE INVENTION The present invention relates to a flat aluminum extruded multi-hole tube constituting a fluid passage of an aluminum heat exchanger, which is joined to another aluminum member such as an aluminum fin. The purpose of the present invention is to solve the above-mentioned problems in an aluminum extruded multi-hole tube coated with a brazing material layer on the outer surface of the brazing material, and to form a uniform brazing material layer to achieve stable brazing. It is an object of the present invention to provide an aluminum extruded multi-hole tube for a heat exchanger and a method for producing the same, which is capable of performing such a process, has excellent corrosion resistance after brazing and excellent heat exchange performance.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めの本発明による熱交換器用アルミニウム押出多穴管
は、他のアルミニウム部材をろう付け接合する偏平形状
のアルミニウム押出多穴管であって、多穴管の両側縁部
に突起部を形成し、多穴管の外表面にろう材層を被覆し
てなることを第１の特徴とし、他のアルミニウム部材を
ろう付け接合する偏平形状のアルミニウム押出多穴管で
あって、多穴管の両側縁部に突起部を形成し、多穴管の
外表面に、多穴管の肉厚の２〜３３％の厚さのろう材層
を被覆してなることを第２の特徴とし、また、ろう材層
が多穴管の押出時に被覆されたものであり、突起部にろ
う材層の巻き込みが生じていることを第３の特徴とす
る。An aluminum extruded multi-hole tube for a heat exchanger according to the present invention for achieving the above object is a flat aluminum extruded multi-hole tube for brazing and joining other aluminum members. The first feature is that projections are formed on both side edges of the multi-hole tube, and the outer surface of the multi-hole tube is coated with a brazing material layer. An aluminum extruded multi-hole tube, wherein projections are formed on both side edges of the multi-hole tube, and a brazing material layer having a thickness of 2 to 33% of the thickness of the multi-hole tube is formed on the outer surface of the multi-hole tube. The second feature is that the brazing material is coated, and the third feature is that the brazing material layer is covered when the multi-hole tube is extruded, and the brazing material layer is involved in the projection. I do.
【０００９】本発明による熱交換器用アルミニウム押出
多穴管の製造方法は、押出ダイスの後面に位置するコン
テナ内に、円錐形状の先端部をそなえた多穴管構成アル
ミニウム材を、該円錐形状の先端部に嵌着する底部を有
する円筒容器状のろう材層構成アルミニウム材に嵌め合
わせてなる押出用ビレットを、前記円錐形状の先端部が
押出ダイス側に位置するよう装入し、押出加工すること
によって、両端縁部に突起部を有するアルミニウム多穴
管を押出成形するとともに、押出時に多穴管の外表面に
ろう材層を被覆することを特徴とする。According to the method of manufacturing an aluminum extruded multi-hole tube for a heat exchanger according to the present invention, an aluminum material constituting a multi-hole tube having a conical tip is placed in a container located on the rear surface of an extrusion die. A billet for extrusion, which is fitted to an aluminum material constituting a brazing material layer in a cylindrical container shape having a bottom fitted to the tip, is charged and extruded so that the cone-shaped tip is located on the extrusion die side. Thus, an aluminum multi-hole tube having protrusions at both end edges is extruded, and the outer surface of the multi-hole tube is coated with a brazing material layer during extrusion.
【００１０】本発明においては、アルミニウム多穴管の
押出成形時にＡｌ−Ｓｉ系合金、Ａｌ−Ｓｉ−Ｚｎ系合
金などからなるろう材層が多穴管に被覆されるから、簡
単な被覆工程で均一なろう材層が形成される。ろう材の
厚さは、多穴管の肉厚の２〜３３％の範囲の厚さが好ま
しい。２％未満ではろう材層が薄過ぎて十分なろう付け
接合が行われ難く、３３％を越えると、母材の溶融が生
じ易くなるため好ましくない。In the present invention, a brazing material layer made of an Al-Si alloy, an Al-Si-Zn alloy, or the like is coated on the multi-hole tube during extrusion molding of the aluminum multi-hole tube. A uniform brazing material layer is formed. The thickness of the brazing material is preferably in the range of 2 to 33% of the thickness of the multi-hole tube. If it is less than 2%, the brazing material layer is too thin and it is difficult to perform sufficient brazing, and if it exceeds 33%, the base material is liable to be melted, which is not preferable.
【００１１】[0011]
【発明の実施の形態】本発明においては、図４に示すよ
うに、円錐形状の先端部７をそなえた多穴管を構成する
アルミニウム材６を、円錐形状の先端部７に嵌着する底
部９を有するろう材層を構成する円筒容器状のアルミニ
ウム材８を嵌め合わせてなる押出用ビレット１０を作製
し、このビレット１０を、押出ダイスの後面に位置する
コンテナ内に、円錐形状の先端部７が押出ダイス側に位
置するよう装入し、図４に示す方向にポートホール押出
加工する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as shown in FIG. 4, a bottom portion for fitting an aluminum material 6 constituting a multi-hole tube having a conical tip 7 to the conical tip 7 is used. A billet for extrusion 10 is formed by fitting an aluminum material 8 in the form of a cylindrical container constituting a brazing material layer having a brazing material layer 9, and the billet 10 is placed in a container located on the rear surface of the extrusion die in a conical tip portion. 7 is placed on the extrusion die side, and the porthole is extruded in the direction shown in FIG.
【００１２】その結果、図１に示すように、両端縁部１
３、１３に突起部１２、１２を有するアルミニウム多穴
管１が押出成形され、押出時に多穴管の外表面にろう材
層５が被覆される。本発明は、アルミニウム多穴管の両
端縁部１３、１３に突起部１２、１２を設けることを特
徴とするものである。As a result, as shown in FIG.
An aluminum multi-hole tube 1 having projections 12, 12 on 3, 13 is extruded, and a brazing material layer 5 is coated on the outer surface of the multi-hole tube during extrusion. The present invention is characterized in that protrusions 12, 12 are provided on both end edges 13, 13 of an aluminum multi-hole tube.
【００１３】当該突起部１２、１２を設けることによ
り、ろう材層の巻き込み部１１、１１は突起部１２、１
２の内部に形成され、多穴管の内部には達しないから、
ろう付け接合された熱交換器が腐食環境下に曝された場
合であっても、流体漏洩のおそれはない。また、形成さ
れた突起部１２、１２は、フィンの役割を果たすため、
熱交換器の熱放散性能が大きくなるという利点もある。By providing the projections 12, 12, the winding portions 11, 11 of the brazing material layer can be projected.
Because it is formed inside 2 and does not reach the inside of the multi-hole tube,
Even if the brazed heat exchanger is exposed to a corrosive environment, there is no risk of fluid leakage. In addition, since the formed projections 12 and 12 serve as fins,
There is also an advantage that the heat dissipation performance of the heat exchanger is increased.
【００１４】図２に示すように、突起部１２、１２の一
部または全体を分割して分断片１４とし、分断片１４を
交互に上下に折り曲げ、熱放散量をさらに大きくするこ
ともできる。As shown in FIG. 2, a part or the whole of the protruding portions 12, 12 may be divided into divided pieces 14, and the divided pieces 14 may be alternately bent up and down to further increase the amount of heat dissipation.
【００１５】[0015]
【実施例】以下、本発明の実施例を説明する。 実施例１ 多穴管を構成するアルミニウム材として、Ｍｎ：１％、
Ｃｕ：０．２％を含有し、残部Ａｌおよび不純物からな
るアルミニウム合金（３００３合金）、ろう材層を構成
するアルミニウム材として、Ｓｉ：７．５％を含有し、
残部Ａｌおよび不純物からなるアルミニウム合金を用
い、図４に示すような押出用ビレットを作製した。な
お、Ｄ1 ＝９２ｍｍ、Ｄ2 ＝８６ｍｍ、Ｈ＝２５ｍｍ、
Ｌ＝３００ｍｍ、α＝４５°とした。Embodiments of the present invention will be described below. Example 1 As an aluminum material constituting a multi-hole tube, Mn: 1%,
Cu: 0.2%, aluminum alloy (3003 alloy) consisting of the balance Al and impurities, Si: 7.5% as an aluminum material constituting the brazing material layer,
An extruded billet as shown in FIG. 4 was produced using an aluminum alloy consisting of the remaining Al and impurities. Note that D 1 = 92 mm, D 2 = 86 mm, H = 25 mm,
L = 300 mm and α = 45 °.
【００１６】このビレットを、ポートホールダイスによ
り８穴の偏平管（全体厚さ１．７ｍｍ、肉厚０．３ｍ
ｍ、突起部を除く幅１６ｍｍ）に押出加工したところ、
押出された偏平多穴管には両端縁部に高さ０．３ｍｍの
突起部が形成され、多孔管の上下面には、Ａｌ−Ｓｉ系
合金ろう材層５が６μｍ（管肉厚の２％）厚さで均一に
被覆されていた。This billet is flattened with a porthole die into an 8-hole flat tube (total thickness 1.7 mm, wall thickness 0.3 m).
m, width excluding protrusions 16mm)
Projections having a height of 0.3 mm are formed on both end edges of the extruded flat multi-hole tube, and an Al-Si alloy brazing material layer 5 is formed on the upper and lower surfaces of the perforated tube at a thickness of 6 μm (2 mm thick). %) It was uniformly coated with the thickness.
【００１７】得られたろう材層被覆多穴管を、図５に示
すように、Ｍｎ：１％、Ｚｎ：１％を含有し、残部Ａｌ
および不純物からなるアルミニウム合金のフィン材と組
合わせ、フッ化物系のフラックスを塗布して、窒素ガス
雰囲気中において、６００℃×３分の条件でノコロック
ろう付けした結果、健全なフィレットが形成され、フィ
ンの座屈などの欠陥は認められなかった。ろう付け後の
熱交換器部品を４週間のＣＡＳＳ試験に供したが、貫通
孔食の発生はなく、耐食性は良好であった。なお、突起
部の内部にろう材層の巻き込み部がみられたが、多孔管
内部までは達していなかった。As shown in FIG. 5, the obtained multi-hole tube coated with a brazing material layer contains Mn: 1%, Zn: 1%, and the balance is Al
In combination with a fin material of an aluminum alloy consisting of impurities, a fluorine-based flux is applied, and in a nitrogen gas atmosphere, Nocolok brazing is performed at 600 ° C. for 3 minutes, so that a sound fillet is formed. No defects such as fin buckling were observed. The heat-exchanged parts after brazing were subjected to a 4-week CASS test. As a result, no pitting corrosion occurred and the corrosion resistance was good. In addition, the entangled portion of the brazing material layer was found inside the protrusion, but did not reach the inside of the porous tube.
【００１８】実施例２ 多穴管を構成するアルミニウム材として、Ｍｎ：１％、
Ｃｕ：０．２％を含有し、残部Ａｌおよび不純物からな
るアルミニウム合金（３００３合金）、ろう材層を構成
するアルミニウム材として、Ｓｉ：７．５％、Ｚｎ：１
％を含有し、残部Ａｌおよび不純物からなるアルミニウ
ム合金を用い、図４に示すような押出用ビレットを作製
した。なお、Ｄ1 ＝９２ｍｍ、Ｄ2 ＝６６ｍｍ、Ｈ＝２
７ｍｍ、Ｌ＝３００ｍｍ、α＝４５°とした。Example 2 As an aluminum material constituting a multi-hole tube, Mn: 1%,
Aluminum alloy containing Cu: 0.2%, the balance being Al and impurities (alloy 3003), as an aluminum material constituting the brazing material layer, Si: 7.5%, Zn: 1
%, And an extruded billet as shown in FIG. 4 was prepared using an aluminum alloy containing the balance of Al and impurities. D 1 = 92 mm, D 2 = 66 mm, H = 2
7 mm, L = 300 mm, and α = 45 °.
【００１９】このビレットを、ポートホールダイスによ
り８穴の偏平管（全体厚さ１．７ｍｍ、肉厚０．３ｍ
ｍ、突起部を除く幅１６ｍｍ）に押出加工したところ、
押出された偏平多穴管には両端縁部に高さ０．３ｍｍの
突起部が形成され、多孔管の上下面には、Ａｌ−Ｓｉ−
Ｚｎ系合金ろう材層５が８０μｍ（管肉厚の２７％）厚
さで均一に被覆されていた。This billet is flattened with a porthole die into an 8-hole flat tube (total thickness 1.7 mm, wall thickness 0.3 m).
m, width excluding protrusions 16mm)
Projections having a height of 0.3 mm are formed at both ends of the extruded flat multi-hole tube, and Al-Si-
The Zn-based alloy brazing material layer 5 was uniformly coated with a thickness of 80 μm (27% of the pipe wall thickness).
【００２０】得られたろう材層被覆多穴管を、図５に示
すように、Ｍｎ：１％、Ｚｎ：１％を含有し、残部Ａｌ
および不純物からなるアルミニウム合金のフィン材と組
合わせ、フッ化物系のフラックスを塗布して、窒素ガス
雰囲気中において、６００℃×３分の条件でノコロック
ろう付けした結果、健全なフィレットが形成され、フィ
ンの座屈などの欠陥は認められなかった。ろう付け後の
熱交換器部品を４週間のＣＡＳＳ試験に供したが、貫通
孔食の発生はなく、耐食性は良好であった。なお、突起
部の内部にろう材層の巻き込み部がみられたが、多孔管
内部までは達していなかった。As shown in FIG. 5, the obtained multi-hole pipe coated with a brazing material layer contains Mn: 1%, Zn: 1%, and the balance is Al
In combination with a fin material of an aluminum alloy consisting of impurities, a fluorine-based flux is applied, and in a nitrogen gas atmosphere, Nocolok brazing is performed at 600 ° C. for 3 minutes, so that a sound fillet is formed. No defects such as fin buckling were observed. The heat-exchanged parts after brazing were subjected to a 4-week CASS test. As a result, no pitting corrosion occurred and the corrosion resistance was good. In addition, the entangled portion of the brazing material layer was found inside the protrusion, but did not reach the inside of the porous tube.
【００２１】比較例１ 多穴管を構成するアルミニウム材として、Ｍｎ：１％、
Ｃｕ：０．２％を含有し、残部Ａｌおよび不純物からな
るアルミニウム合金（３００３合金）、ろう材層を構成
するアルミニウム材として、Ｓｉ：７．５％を含有し、
残部Ａｌおよび不純物からなるアルミニウム合金を用
い、図４に示すような押出用ビレットを作製した。な
お、Ｄ1 ＝９２ｍｍ、Ｄ2 ＝８８ｍｍ、Ｈ＝２６ｍｍ、
Ｌ＝３００ｍｍ、α＝４５°とした。Comparative Example 1 As an aluminum material constituting a multi-hole tube, Mn: 1%,
Cu: 0.2%, aluminum alloy (3003 alloy) consisting of the balance Al and impurities, Si: 7.5% as an aluminum material constituting the brazing material layer,
An extruded billet as shown in FIG. 4 was produced using an aluminum alloy consisting of the remaining Al and impurities. Note that D 1 = 92 mm, D 2 = 88 mm, H = 26 mm,
L = 300 mm and α = 45 °.
【００２２】このビレットを、ポートホールダイスによ
り８穴の偏平管（全体厚さ１．７ｍｍ、肉厚０．３ｍ
ｍ、突起部を除く幅１６ｍｍ）に押出加工したところ、
押出された偏平多穴管には両端縁部に高さ０．３ｍｍの
突起部が形成され、多孔管の上下面には、Ａｌ−Ｓｉ系
合金ろう材層５が３μｍ（管肉厚の１％）厚さでに被覆
されていたが、被覆層には部分的に不均一な箇所がある
のが認められた。The billet was flattened with a porthole die into an 8-hole flat tube (total thickness 1.7 mm, wall thickness 0.3 m).
m, width excluding protrusions 16mm)
Projections having a height of 0.3 mm are formed on both end edges of the extruded flat multi-hole tube, and an Al-Si alloy brazing material layer 5 is formed on the upper and lower surfaces of the perforated tube at a thickness of 3 μm (1 mm thick). %), But the coating layer was found to have partially uneven portions.
【００２３】得られたろう材層被覆多穴管を、図５に示
すように、Ｍｎ：１％、Ｚｎ：１％を含有し、残部Ａｌ
および不純物からなるアルミニウム合金のフィン材と組
合わせ、フッ化物系のフラックスを塗布して、窒素ガス
雰囲気中において、６００℃×３分の条件でノコロック
ろう付けしたところ、形成されたフィレットは所々途切
れており、完全なろいう付け接合が得られなかった。As shown in FIG. 5, the obtained multi-hole pipe coated with a brazing material layer contains Mn: 1%, Zn: 1%, and the balance is Al
In combination with fin material of aluminum alloy consisting of impurities and impurities, fluoride flux was applied and brazed with Nocolok at 600 ° C. for 3 minutes in a nitrogen gas atmosphere. As a result, complete bonding was not obtained.
【００２４】比較例２ 多穴管を構成するアルミニウム材として、Ｍｎ：１％、
Ｃｕ：０．２％を含有し、残部Ａｌおよび不純物からな
るアルミニウム合金（３００３合金）、ろう材層を構成
するアルミニウム材として、Ｓｉ：７．５％を含有し、
残部Ａｌおよび不純物からなるアルミニウム合金を用
い、図４に示すような押出用ビレットを作製した。な
お、Ｄ1 ＝９２ｍｍ、Ｄ2 ＝５８ｍｍ、Ｈ＝３０ｍｍ、
Ｌ＝３００ｍｍ、α＝４５°とした。Comparative Example 2 As an aluminum material constituting a multi-hole tube, Mn: 1%,
Cu: 0.2%, aluminum alloy (3003 alloy) consisting of the balance Al and impurities, Si: 7.5% as an aluminum material constituting the brazing material layer,
An extruded billet as shown in FIG. 4 was produced using an aluminum alloy consisting of the remaining Al and impurities. In addition, D 1 = 92 mm, D 2 = 58 mm, H = 30 mm,
L = 300 mm and α = 45 °.
【００２５】このビレットを、ポートホールダイスによ
り８穴の偏平管（全体厚さ１．７ｍｍ、肉厚０．３ｍ
ｍ、突起部を除く幅１６ｍｍ）に押出加工したところ、
押出された偏平多穴管には両端縁部に高さ０．３ｍｍの
突起部が形成され、多孔管の上下面には、Ａｌ−Ｓｉ系
ろう材層５が１１０μｍ（管肉厚の３７％）厚さでに被
覆されていた。This billet is flattened with a porthole die into an 8-hole flat tube (total thickness 1.7 mm, wall thickness 0.3 m).
m, width excluding protrusions 16mm)
Projections having a height of 0.3 mm are formed at both ends of the extruded flat multi-hole tube, and an Al-Si-based brazing material layer 5 is formed on the upper and lower surfaces of the porous tube at 110 μm (37% of the tube wall thickness). ) Was coated in thickness.
【００２６】得られたろう材層被覆多穴管を、図５に示
すように、Ｍｎ：１％、Ｚｎ：１％を含有し、残部Ａｌ
および不純物からなるアルミニウム合金のフィン材と組
合わせ、フッ化物系のフラックスを塗布して、窒素ガス
雰囲気中において、６００℃×３分の条件でノコロック
ろう付けしたところ、多孔管とフィンとの間にはフィレ
ットが形成されていたが、母材の多孔管が溶融して貫通
孔が生じていた。As shown in FIG. 5, the obtained multi-well pipe coated with a brazing material layer contains Mn: 1%, Zn: 1%, and the balance is Al
In combination with a fin material of an aluminum alloy consisting of impurities, a fluoride flux was applied, and brazed with Nocolok at 600 ° C. for 3 minutes in a nitrogen gas atmosphere. Had a fillet formed therein, but the perforated tube of the base material had melted to form a through hole.
【００２７】[0027]
【発明の効果】以上のとおり、本発明によれば、均一な
ろう材層が形成され、安定したろう付け接合を行うこと
ができるアルミニウム押出多穴管が得られる。当該アル
ミニウム押出多穴管は耐食性、熱交換性能にも優れてお
り、アルミニウム製熱交換器において、フィン材として
ベア材を使用することを可能とする。従って、フィン材
の薄肉化が可能となり、熱交換器の軽量化が達成でき
る。ろう材層の形成も簡単且つ安価に行うことができ
る。As described above, according to the present invention, it is possible to obtain an aluminum extruded multi-hole tube in which a uniform brazing material layer is formed and stable brazing can be performed. The extruded aluminum multi-hole tube is also excellent in corrosion resistance and heat exchange performance, and makes it possible to use a bare material as a fin material in an aluminum heat exchanger. Therefore, the thickness of the fin material can be reduced, and the weight of the heat exchanger can be reduced. The brazing material layer can be formed easily and at low cost.
【図１】ろう材層を被覆した本発明の偏平多穴管の断面
図である。FIG. 1 is a sectional view of a flat multi-hole tube of the present invention coated with a brazing material layer.
【図２】本発明の偏平多穴管の突起部の変形例を示す斜
視図である。FIG. 2 is a perspective view showing a modified example of the projection of the flat multi-hole tube of the present invention.
【図３】ろう材層を被覆した従来の偏平多穴管の断面図
である。FIG. 3 is a cross-sectional view of a conventional flat multi-hole tube covered with a brazing material layer.
【図４】ろう材被覆多穴管の押出用ビレットの断面図で
ある。FIG. 4 is a cross-sectional view of a billet for extrusion of a brazing material-coated multi-hole tube.
【図５】偏平多穴管とフィンを組合わせてなるアルミニ
ウム製熱交換器エレメントを示す一部斜視図である。FIG. 5 is a partial perspective view showing an aluminum heat exchanger element formed by combining a flat multi-hole tube and fins.
１ 偏平多孔管 ２ フィン ３ 平坦部 ４ 平坦部 ５ ろう材層 ６ 多穴管構成アルミニウム材 ７ 円錐形状先端部 ８ ろう材構成アルミニウム材 ９ 底部 10 押出用ビレット 11 巻き込み部 12 突起部 13 側端縁部 14 分断片 DESCRIPTION OF SYMBOLS 1 Flat perforated pipe 2 Fin 3 Flat part 4 Flat part 5 Brazing material layer 6 Aluminum material constituting multi-hole tube 7 Conical tip 8 Brazing material aluminum material 9 Bottom part 10 Billet for extrusion 11 Entangling part 12 Projecting part 13 Side edge Part 14 minutes fragment
Claims (4)
る偏平形状のアルミニウム押出多穴管であって、多穴管
の両側縁部に突起部を形成し、多穴管の外表面にろう材
層を被覆してなることを特徴とする熱交換器用アルミニ
ウム押出多穴管。1. A flat aluminum extruded multi-hole tube for brazing and joining another aluminum member, wherein projections are formed on both side edges of the multi-hole tube, and a brazing material layer is formed on an outer surface of the multi-hole tube. An aluminum extruded multi-hole tube for a heat exchanger, characterized by being coated with:
る偏平形状のアルミニウム押出多穴管であって、多穴管
の両側縁部に突起部を形成し、多穴管の外表面に、多穴
管の肉厚の２〜３３％の厚さのろう材層を被覆してなる
ことを特徴とする熱交換器用アルミニウム押出多穴管。2. A flat aluminum extruded multi-hole tube in which another aluminum member is brazed and joined, wherein projections are formed on both side edges of the multi-hole tube, and a multi-hole tube is formed on an outer surface of the multi-hole tube. An extruded aluminum multi-hole tube for a heat exchanger, which is coated with a brazing material layer having a thickness of 2 to 33% of the wall thickness of the tube.
ものであり、突起部にろう材層の巻き込みが生じている
ことを特徴とする熱交換器用アルミニウム押出多穴管。3. An aluminum extruded multi-hole tube for a heat exchanger, wherein the brazing material layer is coated at the time of extrusion of the multi-hole tube, and the brazing material layer is involved in the projection.
に、円錐形状の先端部をそなえた多穴管構成アルミニウ
ム材を、該円錐形状の先端部に嵌着する底部を有する円
筒容器状のろう材層構成アルミニウム材に嵌め合わせて
なる押出用ビレットを、前記円錐形状の先端部が押出ダ
イス側に位置するよう装入し、押出加工することによっ
て、両端縁部に突起部を有するアルミニウム多穴管を押
出成形するとともに、押出時に多穴管の外表面にろう材
層を被覆することを特徴とする熱交換器用アルミニウム
多穴管の製造方法。4. A cylindrical container-shaped solder having a bottom formed by fitting an aluminum material constituting a multi-hole tube having a conical tip into a container located on the rear surface of the extrusion die. An extruded billet fitted to a material layer constituting aluminum material is loaded so that the tip of the conical shape is located on the extrusion die side, and is extruded to form an aluminum multi-hole having projections at both end edges. A method for manufacturing an aluminum multi-hole tube for a heat exchanger, comprising extruding a tube and coating a brazing material layer on an outer surface of the multi-hole tube during extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197397A JPH10197175A (en) | 1997-01-07 | 1997-01-07 | Extruded multi-hole aluminum tube for heat exchanger and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197397A JPH10197175A (en) | 1997-01-07 | 1997-01-07 | Extruded multi-hole aluminum tube for heat exchanger and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10197175A true JPH10197175A (en) | 1998-07-31 |
Family
ID=11792556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1197397A Pending JPH10197175A (en) | 1997-01-07 | 1997-01-07 | Extruded multi-hole aluminum tube for heat exchanger and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10197175A (en) |
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|---|---|---|---|---|
| WO2013161792A1 (en) * | 2012-04-27 | 2013-10-31 | 三菱電機株式会社 | Heat exchanger, method for producing same, and refrigeration cycle device |
| JPWO2013161792A1 (en) * | 2012-04-27 | 2015-12-24 | 三菱電機株式会社 | Heat exchanger, method for manufacturing the same, and refrigeration cycle apparatus |
| WO2018147375A1 (en) * | 2017-02-13 | 2018-08-16 | 株式会社Uacj | Aluminum extruded flat perforated pipe exhibiting excellent brazing properties and outer-surface corrosion resistance, and aluminum heat exchanger obtained using same |
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-
1997
- 1997-01-07 JP JP1197397A patent/JPH10197175A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013161792A1 (en) * | 2012-04-27 | 2013-10-31 | 三菱電機株式会社 | Heat exchanger, method for producing same, and refrigeration cycle device |
| CN104246410A (en) * | 2012-04-27 | 2014-12-24 | 三菱电机株式会社 | Heat exchanger, method for producing same, and refrigeration cycle device |
| JPWO2013161792A1 (en) * | 2012-04-27 | 2015-12-24 | 三菱電機株式会社 | Heat exchanger, method for manufacturing the same, and refrigeration cycle apparatus |
| US9546823B2 (en) | 2012-04-27 | 2017-01-17 | Mitsubishi Electric Corporation | Heat exchanger, method of manufacturing same, and refrigeration cycle apparatus |
| WO2018147375A1 (en) * | 2017-02-13 | 2018-08-16 | 株式会社Uacj | Aluminum extruded flat perforated pipe exhibiting excellent brazing properties and outer-surface corrosion resistance, and aluminum heat exchanger obtained using same |
| CN110291355A (en) * | 2017-02-13 | 2019-09-27 | 株式会社Uacj | Soldering property and the excellent aluminum extruded flat perforated pipe of outside surface anticorrosion corrosion and use aluminum-made heat exchanger made of it |
| DE112018000796T5 (en) | 2017-02-13 | 2019-12-05 | Uacj Corporation | Extruded flat perforated aluminum tube exhibiting excellent brazing properties and methods of making same |
| JP2022083967A (en) * | 2020-11-25 | 2022-06-06 | 広州華凌制冷設備有限公司 | Heat exchanger and fin thereof, and heat exchanging apparatus and air-conditioner |
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| CN113587675B (en) * | 2021-08-18 | 2023-11-14 | 河南中多铝镁新材有限公司 | High-pressure-resistant radiator |
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