JPH10185480A - Production of cross-fin tube - Google Patents

Production of cross-fin tube

Info

Publication number
JPH10185480A
JPH10185480A JP33812596A JP33812596A JPH10185480A JP H10185480 A JPH10185480 A JP H10185480A JP 33812596 A JP33812596 A JP 33812596A JP 33812596 A JP33812596 A JP 33812596A JP H10185480 A JPH10185480 A JP H10185480A
Authority
JP
Japan
Prior art keywords
cross
fin
tube
sheet material
sheet member
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.)
Withdrawn
Application number
JP33812596A
Other languages
Japanese (ja)
Inventor
Toru Kurimoto
亨 栗本
Makoto Ofuku
誠 大福
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sango Co Ltd
Original Assignee
Sango Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sango Co Ltd filed Critical Sango Co Ltd
Priority to JP33812596A priority Critical patent/JPH10185480A/en
Publication of JPH10185480A publication Critical patent/JPH10185480A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/105Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being corrugated elements extending around the tubular elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40Tubular 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

PROBLEM TO BE SOLVED: To facilitate production of a cross-tin tube by mounting a planar corrugated fin material on a sheet member and securing the joint thereof, bending the sheet member to have a substantially U-shaped cross-section with the tin material being set on the inside and then bonding the opposite ends in the bending direction of the sheet member tightly each other. SOLUTION: When a cross-fin tube is produced, a planar corrugated fin material 2b is mounted, at first, on a planar sheet member 1c and a contact part 3 with the fin material 2b and the sheet member 1c is secured and then the sheet member 1c provided with the fin material 2b is bent to have a substantially U-shaped cross-section with the fin material 1c being set on the inside. More specifically, the sheet member 1c is mounted on die 7 having a concave face 6 and pressed with a first punch 9 provided with a substantially U-shaped convex face 8 followed by pressing with a second punch 13 provided with a concave face 12. The tin material 2b is wound on the inside and the sheet member 1c is wound tubularly, as a whole, and the opposite ends 1f, 1t thereof are brazed thus completing a cross-fin tube.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、クロスフィンチュ
ーブの製造方法に関するものである。
[0001] The present invention relates to a method for manufacturing a cross fin tube.

【0002】[0002]

【従来の技術】従来、管(チューブ)内に、径方向断面
を有するとともに管軸方向に延在するクロスフィンを設
け、該管内を流通する流体をクロスフィンに当接させて
熱伝達の促進を図る熱交換器の一種であるクロスフィン
チューブがある。
2. Description of the Related Art Conventionally, cross fins having a radial cross section and extending in the tube axis direction are provided in a tube (tube), and a fluid flowing in the tube is brought into contact with the cross fins to promote heat transfer. There is a cross fin tube, which is a type of heat exchanger designed to reduce heat.

【0003】このようなクロスフィンチューブの製造方
法として従来、予め引き抜き加工で星型断面に形成した
クロスフィンを、流体を流通させる管内に挿入した後に
固着してクロスフィンを製造する方法が例えば特公平3
−68766号公報に開示されている。これを第1の従
来の技術とする。
Conventionally, as a method for manufacturing such a cross fin tube, for example, a method for manufacturing a cross fin by inserting a cross fin previously formed into a star-shaped cross section by a drawing process into a pipe through which a fluid flows and then fixing the cross fin is known. Fairness 3
-68766. This is referred to as a first conventional technique.

【0004】また、熱交換器として使用される管(チュ
ーブ)ではないが、1枚のシート素材に波板を分割配置
して固着し、そのシート素材をうず巻き断面となるよう
に巻回し、波板をシート素材間に巻き込んで、フィン様
物を管内に設ける製造方法が例えば特公昭62−453
1号公報に開示されている。これを第2の従来の技術と
する。
[0004] Further, although not a tube used as a heat exchanger, a corrugated sheet is divided and fixed on one sheet material, and the sheet material is wound so as to have a spiral cross section, thereby forming a wave. A manufacturing method in which a plate is wound between sheet materials and a fin-like material is provided in a tube is disclosed in, for example, Japanese Patent Publication No.
No. 1 discloses this. This is referred to as a second conventional technique.

【0005】[0005]

【発明が解決しようとする課題】上記第1の従来の技術
においては、クロスフィンを引き抜き加工により形成す
ることから、そのクロスフィンの引き抜き加工による形
状の制約があり、その断面形状の自由度が少ない。更
に、クロスフィンを引き抜き加工するための型(ダイ
ス)と特殊な設備が必要でコスト高となるとともに、そ
の形状を変更する場合には型を変更しなければならず、
これもコスト高の要因となる。更に、クロスフィンを管
内に挿入した後にそのクロスフィンと管との接触部をロ
ウ付け等で固定しなければならず、その固定作業が困難
である。更に、クロスフィンを管軸方向に複数に分割配
置することが困難等の問題がある。
In the first prior art, since the cross fin is formed by drawing, the shape of the cross fin is limited by the drawing, and the degree of freedom of the cross-sectional shape is limited. Few. Furthermore, a die (die) for drawing out the cross fins and special equipment are required, which increases the cost, and when the shape is changed, the die must be changed.
This also causes a high cost. Further, after the cross fin is inserted into the pipe, the contact portion between the cross fin and the pipe must be fixed by brazing or the like, and the fixing operation is difficult. Further, there is a problem that it is difficult to divide the cross fin into a plurality of pieces in the pipe axis direction.

【0006】また、上記第2の従来の技術を用いてクロ
スフィンチューブを製造することも考えられるが、この
製造方法によると、シートが余分に必要となり、重量増
及び材料費増になる等の問題がある。
It is also conceivable to manufacture a cross fin tube by using the second conventional technique. However, according to this manufacturing method, an extra sheet is required, resulting in an increase in weight and material cost. There's a problem.

【0007】そこで本発明は、上記の各問題を解決でき
るクロスフィンチューブの製造方法を提供することを目
的とするものである。
Accordingly, an object of the present invention is to provide a method for manufacturing a cross fin tube that can solve the above-mentioned problems.

【0008】[0008]

【課題を解決するための手段】上記の課題を解決するた
めに、請求項1記載の第1の発明は、シート材(1c)
に波板状のフィン素材(2b)を載置してその両者の接
合部を固定し、次に上記シート材(1c)を、フィン素
材(2b)が内側となるように略U字断面形状に曲げた
後に円断面形状に形成し、次で上記シート材(1c)の
曲げ方向の両端(1f)を密着接合することを特徴とす
ものである。
According to a first aspect of the present invention, a sheet material (1c) is provided.
A fin material (2b) in the form of a corrugated sheet is placed on the sheet material to fix the joint between the two, and then the sheet material (1c) is substantially U-shaped so that the fin material (2b) is on the inside. After forming the sheet material (1c), the sheet material (1c) is tightly joined to both ends (1f) in the bending direction.

【0009】請求項2記載の第2の発明は、上記第1の
発明における略U字状断面形状への曲げ加工を、半円状
の凹型面(6)を有するダイ(7)と、略U字状の凸型
面(8)を有する第1のパンチ(9)で行い、円断面形
状への曲げ加工を、半円状の凹型面(10)を有するダ
イ(11)と、略U字状の凹型面(12)を有する第2
のパンチ(13)で行うようにしたものである。
According to a second aspect of the present invention, the bending process into the substantially U-shaped cross-section according to the first aspect of the present invention is performed by using a die (7) having a semicircular concave surface (6), A first punch (9) having a U-shaped convex surface (8) is used to perform bending into a circular cross-sectional shape, a die (11) having a semicircular concave surface (10), and a substantially U-shaped. A second with a concave surface (12) in the shape of a letter
Is performed by using the punch (13).

【0010】請求項3記載の第3の発明は、上記第2の
発明において、第1のパンチにおける凸型面が、フィン
素材を有しない部分に配置され、該凸型面がシート材を
直接折曲するようにしたものである。
According to a third aspect of the present invention, in the second aspect, the convex surface of the first punch is disposed in a portion having no fin material, and the convex surface directly contacts the sheet material. It is designed to be bent.

【0011】[0011]

【発明の実施の形態】図の実施例に基づいて本発明の実
施の形態について説明する。先ず、本発明により製造さ
れるクロスフィンチューブについて図1により説明す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described based on an embodiment shown in the drawings. First, a cross fin tube manufactured according to the present invention will be described with reference to FIG.

【0012】1は被冷却媒体等の流体を流通させる管
で、熱伝導性の高い材質、例えばアルミニウム等により
形成されている。該管1の一方の開口端1aは流体の導
入部へ連通され、他方の開口端1bは流体の排出部へ連
通される。該管1は円形断面に形成されているが、必要
により楕円、長円断面にしてもよい。
Reference numeral 1 denotes a pipe through which a fluid such as a medium to be cooled flows, and is formed of a material having high thermal conductivity, such as aluminum. One open end 1a of the tube 1 is connected to a fluid inlet, and the other open end 1b is connected to a fluid outlet. The pipe 1 is formed in a circular cross section, but may be formed in an elliptical or elliptical cross section as necessary.

【0013】上記管1内にはクロスフィン2が内蔵され
ている。該クロスフィン2は管1の径方向に略放射状断
面を有し、かつ管軸方向に所定の長さで延在している。
更に、より詳しくは1枚の金属板が波状に折曲されて管
1の周方向に配置され、略星型断面に形成されていると
ともにそのクロスフィン2と管1の内面との接触部3が
ロー付け等により固着されている。これにより、クロス
フィン2の各フィン部2aが、略管径方向の断面でかつ
相互間に流通空隙部4を有し、更に管軸方向に所定長延
存している。該クロスフィン2は熱伝導性の高い材質、
例えばアルミニウム等により形成されている。
A cross fin 2 is built in the tube 1. The cross fin 2 has a substantially radial cross section in the radial direction of the tube 1 and extends at a predetermined length in the tube axis direction.
More specifically, one metal plate is bent in a wave shape and arranged in the circumferential direction of the tube 1 to form a substantially star-shaped cross section, and a contact portion 3 between the cross fin 2 and the inner surface of the tube 1. Are fixed by brazing or the like. As a result, each fin portion 2a of the cross fin 2 has a cross section substantially in the radial direction of the tube, and has the flow gap 4 between them, and further extends a predetermined length in the axial direction of the tube. The cross fin 2 is made of a material having high heat conductivity,
For example, it is formed of aluminum or the like.

【0014】尚、図1(a)においては、クロスフィン
2を分割して管軸方向に複数個(3個)配置した例を示
す。このような管1とクロスフィン2とからなるクロス
チューブ5において、例えば、加熱された流体を管1内
に流通させると、その流体はクロスフィン2に当接し、
その流体の熱はクロスフィン2に伝達され、更に接触部
3のロー付け部から管1に伝達されて外部へ放熱され
る。
FIG. 1A shows an example in which the cross fins 2 are divided and a plurality (three) are arranged in the tube axis direction. In such a cross tube 5 composed of the pipe 1 and the cross fins 2, for example, when a heated fluid flows through the pipe 1, the fluid comes into contact with the cross fins 2,
The heat of the fluid is transmitted to the cross fins 2 and further transmitted from the brazing portion of the contact portion 3 to the tube 1 and radiated to the outside.

【0015】次に、上記のようなクロスフィンチューブ
の製造方法について説明する。図2及び図3は製造方法
の第1実施例を示す。先ず、図2(a)に示すように、
上記管1の素材である平板状のシート材1c上にクロス
フィン2の素材である波板状のフィン素材2bを載置
し、そのフィン素材2bの谷部2cとシート材1cとの
接触部3をロー付け等により固着する。
Next, a method for manufacturing the above-described cross fin tube will be described. 2 and 3 show a first embodiment of the manufacturing method. First, as shown in FIG.
A corrugated fin material 2b, which is a material of the cross fins 2, is placed on a flat sheet material 1c, which is a material of the tube 1, and a contact portion between a valley 2c of the fin material 2b and the sheet material 1c. 3 is fixed by brazing or the like.

【0016】上記シート材1cは、図3に示すように、
その幅L1 を製造される管1の周長に設定し、長さL2
を製造される管1の軸方向長に設定して形成されてい
る。また、フィン素材2bは、図3に示すように、その
波の山部2dの稜線X1 −X1 がシート材1cの管成形
時における管軸方向X−X線と並行するように配置され
ている。更に、上記管軸方向X−X線と直交する方向の
フィン素材2bの長さは、その方向の両端側にシート材
1cの端部1dが若干露出する長さに設定されている。
更に、フィン素材2bの波形状は、そのフィン素材2b
がシート材1cとともに管状に巻かれた場合に所定のフ
ィン形状に変形するように設定されている。
The sheet material 1c is, as shown in FIG.
The width L 1 is set to the circumference of the pipe 1 to be manufactured, and the length L 2
Is set to the axial length of the tube 1 to be manufactured. Further, as shown in FIG. 3, the fin material 2b is arranged such that the ridge line X 1 -X 1 of the wave crest 2d is parallel to the tube axis direction XX when the sheet material 1c is formed into a tube. ing. Further, the length of the fin material 2b in the direction orthogonal to the tube axis direction XX is set to a length such that the end 1d of the sheet material 1c is slightly exposed at both ends in that direction.
Further, the wave shape of the fin material 2b is
Is set to be deformed into a predetermined fin shape when it is wound in a tubular shape together with the sheet material 1c.

【0017】更に、フィン素材2bの谷部2c近辺のフ
ィン部2aには、フィン素材2bを押し曲げてなる突起
部2fが形成され、該突起部2fにより受熱面を多くし
て熱交換効率の促進が図られている。
Further, a protrusion 2f formed by pressing and bending the fin material 2b is formed on the fin 2a near the valley 2c of the fin material 2b, and the heat receiving surface is increased by the protrusion 2f to improve the heat exchange efficiency. Promotion is being pursued.

【0018】更に、上記フィン素材2bは、1枚のシー
ト材1c上に3個、上記X−X方向に所定の隙間Dをも
って分割配置されている。
Further, the fin material 2b is divided into three pieces on one sheet material 1c with a predetermined gap D in the XX direction.

【0019】次に、上記のフィン素材付シート材1c
を、そのフィン素材1cが内側となるように略U字状に
折曲する。このU曲げ方法は、先ず図2(b)に示すよ
うに、断面半円形でかつ図2(b)の紙面の表裏方向に
上記図3のL2 と同等又は若干長い寸法の凹型面6を有
するダイ7上に上記シート材1cを載置する。次で上記
凹型面6の半径よりシート材1cの板厚分小さい半径の
半円面8aを有しかつ上記図3(a)に示す隙間Dに位
置する部分に配置された略U字状の凸型面8を設けた第
1のパンチ9で図2(b)のように加圧する。これによ
りシート材1cは凹型面6と凸型面8で直接U字状に折
曲され、フィン素材2bは両型面6,8で押圧されるこ
となくシート材1cとともにU状に折曲する。
Next, the above-mentioned sheet material with fin material 1c
Is bent in a substantially U-shape such that the fin material 1c is on the inside. The U bending method, first, as shown in FIG. 2 (b), the concave surface 6 of the sheet of the front and back direction L 2 equal to or slightly longer dimension of the Figure 3 and Figure 2 (b) in a semicircular cross section The sheet material 1c is placed on the die 7 having the same. Next, a substantially U-shaped semi-circular surface 8a having a radius smaller than the radius of the concave surface 6 by the thickness of the sheet material 1c and located in the gap D shown in FIG. Pressure is applied by the first punch 9 provided with the convex surface 8 as shown in FIG. As a result, the sheet material 1c is bent directly into a U-shape at the concave surface 6 and the convex surface 8, and the fin material 2b is bent into a U shape together with the sheet material 1c without being pressed by both the mold surfaces 6,8. .

【0020】次に、上記U状に折曲されたシート材1c
を、図2(c)に示すように、上記ダイ7の凹型面6と
同形状の凹型面10を形成したダイ11に、その凹型面
10に嵌合してセットした後、断面略U字形でかつ紙面
の表裏方向に上記凹型面10と同寸法の長さを有する凹
型面12を形成した第2のパンチ13で加圧する。
Next, the sheet material 1c bent in the U-shape is used.
As shown in FIG. 2 (c), after fitting into a die 11 having a concave surface 10 having the same shape as the concave surface 6 of the die 7 and setting the concave surface 10, the U-shaped section is formed. Then, pressure is applied in the front and back direction of the paper surface by a second punch 13 having a concave surface 12 having the same length as the concave surface 10.

【0021】これにより、シート材1cの両起立部1
e,1eは凹型面12の曲面に沿って内側へ円弧状に折
曲され、その両端1f,1fが相互に当接して、鎖線の
ように、上半部が断面半円状になり、全体として、内側
にフィン素材2bが巻き込まれ、かつシート1cが円筒
状(O状)に巻かれた状態になる。
Thus, both upright portions 1 of the sheet material 1c are formed.
e, 1e are bent inwardly in an arc along the curved surface of the concave surface 12, and their both ends 1f, 1f abut each other, and the upper half becomes semicircular in cross section like a chain line. As a result, the fin material 2b is wound inside, and the sheet 1c is wound into a cylindrical shape (O shape).

【0022】以上のようなU曲げとO状曲げは、一般に
U−O曲げと称される丸め型構造を使用することができ
る。次で、上記シート材1cを脱型してその両端1f,
1fをロー付け、溶接等で水密或いは気密的に固着接合
する。これにより、図1(a)(b)に示すようなクロ
スフィンチューブ5が形成される。
For the above-mentioned U-shaped bending and O-shaped bending, a rounded structure generally called U-O bending can be used. Next, the sheet material 1c is removed from the mold and both ends 1f,
1f is brazed and fixedly joined in a watertight or airtight manner by welding or the like. Thus, a cross fin tube 5 as shown in FIGS. 1A and 1B is formed.

【0023】図4は上記シート材1cに対するフィン素
材2bの波方向が異なる実施例を示すもので、フィン素
材2bの山部2dの稜線X1 −X1 が、シート材1cに
おける管軸となるX−X線に対して角度αを有するよう
に波形を形成したものである。この交差角αは所望に設
定する。このようにすると、成形された管1内を流通す
る流体が各フィン部2aに強く当接し、熱交換が促進さ
れる。
FIG. 4 shows an embodiment in which the wave direction of the fin material 2b is different from that of the sheet material 1c. The ridge line X 1 -X 1 of the peak 2d of the fin material 2b becomes the tube axis of the sheet material 1c. A waveform is formed so as to have an angle α with respect to the XX line. This intersection angle α is set as desired. In this way, the fluid flowing through the formed pipe 1 strongly contacts each fin portion 2a, and heat exchange is promoted.

【0024】また、フィン素材2bを上記のように分割
する場合には、図4に示すように、上記稜線X1 −X1
の傾斜方向を、隣り合うフィン素材2b,2b同士が異
なる方向になるように形成すると、より一層熱交換が促
進される。
When the fin material 2b is divided as described above, as shown in FIG. 4, the ridge line X 1 -X 1
Is formed so that the adjacent fin materials 2b are different from each other, heat exchange is further promoted.

【0025】次に、製造方法の第2実施例を図5により
説明する。本第2実施例は、一般に使用されているロッ
クシーム加工機を使用するもので、先ず、上記図2
(a)のように形成されたフィン素材付きのシート材1
cを、図5(a)に示すように、芯金であるマンドレル
14の下部に供給する。上記マンドレル14は、押し板
15,15間の間隔よりシート材1cの板厚分小径の円
形断面からなる型部14aと、該型部14aより、上記
フィン素材2bの波高さ以上分小径の芯部14bとから
なり、かつ、上記型部14aは上記図3(a)に示す隙
間Dに位置する部分に配置されている。
Next, a second embodiment of the manufacturing method will be described with reference to FIG. The second embodiment uses a commonly used lock seam processing machine.
Sheet material 1 with fin material formed as in (a)
5c is supplied to the lower part of the mandrel 14 which is a metal core, as shown in FIG. The mandrel 14 has a mold portion 14a having a circular cross section having a diameter smaller than the interval between the pressing plates 15 and 15 by the thickness of the sheet material 1c, and a core having a diameter smaller than the wave height of the fin material 2b by the mold portion 14a. 3a, and the mold portion 14a is disposed in a portion located in the gap D shown in FIG. 3A.

【0026】次で、上記押し板15を図5(b)のよう
に上昇し、その押し板15によりシート材1cを型部1
4aに沿ってU状に折曲する。これによりフィン素材2
bは押し板15と型部14a間で押圧されることなく、
シート材1cとともに折曲される。次で一組のハゼ締め
ローラ16a,16bを図5(b)の紙面の裏方向に多
数設けるとともに漸次ローラ16a,16b間の間隔を
狭めたハゼ締め機構をマンドレル14の軸方向に移動し
て、上記のシート材1cの両端1f,1fを鎖線のよう
に内側へ曲げた後、ハゼ締め1gして接合し、シート材
1cを円筒状にする。これにより、上記図1(b)に示
すようなクロスフィン2を巻き込んだクロスフィンチュ
ーブ5が形成される。
Next, the push plate 15 is raised as shown in FIG. 5B, and the sheet material 1c is
Fold in a U shape along 4a. This makes the fin material 2
b is not pressed between the pressing plate 15 and the mold portion 14a,
It is bent together with the sheet material 1c. Next, a large number of sets of goby tightening rollers 16a and 16b are provided in the reverse direction of the paper surface of FIG. 5B, and a goby tightening mechanism in which the distance between the rollers 16a and 16b is gradually reduced is moved in the axial direction of the mandrel 14. After bending both ends 1f, 1f of the above-mentioned sheet material 1c inward as shown by a chain line, the sheet material 1c is joined by fastening with a gouge 1g. Thus, a cross fin tube 5 in which the cross fins 2 are wound as shown in FIG. 1B is formed.

【0027】尚、上記フィン素材2bが1枚のシート材
1cに1枚設けられる場合には、そのフィン素材の両側
に形成される無フィン素材部に位置して上記凸型面8及
び型部分14aを配置する。
When one fin material 2b is provided on one sheet material 1c, the convex surface 8 and the mold portion are located at finless material portions formed on both sides of the fin material. 14a is arranged.

【0028】図6は、上記のように製造されたクロスフ
ィンチューブ5を2重管式熱交換器に使用した実施例を
示す。該図6において、1は上記のように形成された
管、2は上記のように管1内に設けられたクロスフィン
である。
FIG. 6 shows an embodiment in which the cross-fin tube 5 manufactured as described above is used for a double-pipe heat exchanger. In FIG. 6, reference numeral 1 denotes a tube formed as described above, and reference numeral 2 denotes a cross fin provided in the tube 1 as described above.

【0029】上記管1の外周には、その外周を離間して
囲むように外筒17が配置されているとともに、該外管
17の両端部17a,17bが管1の外周面に溶接等で
固着され、両管1,17間に冷却媒体の流通室18が形
成されている。
An outer cylinder 17 is disposed on the outer periphery of the tube 1 so as to surround the outer periphery of the tube 1 at a distance, and both end portions 17a and 17b of the outer tube 17 are welded to the outer peripheral surface of the tube 1 by welding or the like. A cooling medium circulation chamber 18 is formed between the two tubes 1 and 17.

【0030】上記外管17には、冷却媒体の導入管19
と排出管20が設けられている。そして、管1内を流通
する被冷却媒体は、クロスフィン2のフィン部2a間の
流通空隙部4を流通して各フィン部2aに当接し、被冷
却媒体の熱がフィン部2aに奪われ、その熱は管1に伝
達し、更に流通室18内を流通する冷却媒体に伝熱され
て排熱される。
The outer pipe 17 has an inlet pipe 19 for a cooling medium.
And a discharge pipe 20 are provided. The medium to be cooled flowing in the pipe 1 flows through the flow gaps 4 between the fins 2a of the cross fins 2 and comes into contact with the fins 2a, and the heat of the medium to be cooled is taken by the fins 2a. Then, the heat is transmitted to the pipe 1 and further transferred to the cooling medium flowing in the flow chamber 18 to be exhausted.

【0031】図7は更に、上記の2重管式交換器を自動
車のEGRパイプに適用した例を示す。この図におい
て、1は上記の管1に相当し、該管1の上流側1aには
図示しない内燃機関のエキゾーストマニホールドが連結
され、後流側1bには図示しないインテークマニホール
ドが連結され、排気ガスが矢印のように管1内を流通す
る。尚、上記と同一部材には同一符号を付す。
FIG. 7 shows an example in which the above-described double-pipe exchanger is applied to an EGR pipe of an automobile. In this figure, reference numeral 1 corresponds to the above-mentioned pipe 1. An exhaust manifold (not shown) of an internal combustion engine (not shown) is connected to an upstream side 1a of the pipe 1, and an intake manifold (not shown) is connected to a downstream side 1b. Flows through the pipe 1 as indicated by the arrow. The same members as those described above are denoted by the same reference numerals.

【0032】[0032]

【発明の効果】以上のようであるから、請求項1記載の
発明によれば、管とクロスフィンとの固定が、管状に形
成する以前における平板状のシート材に対して波板状の
クロスフィンを固定する作業で行えるので、これらをロ
ー付け等で固着する作業が、従来のようにクロスフィン
を管内に挿入した後に固定するものに比べて、極めて容
易かつ確実に行える。
As described above, according to the first aspect of the present invention, the tube and the cross fins are fixed to the flat sheet material before the tube is formed into a corrugated cloth. Since the work can be performed by fixing the fins, the work of fixing them by brazing or the like can be performed extremely easily and reliably as compared with the conventional work of fixing the cross fin after inserting it into the pipe.

【0033】更に、クロスフィンを所望の波形に形成し
てもこれを管内に巻き込むことができるので、クロスフ
ィンの断面形状の制約がなく、断面形状の自由度が増大
する。
Furthermore, even if the cross fin is formed into a desired waveform, it can be wound into the tube, so that there is no restriction on the cross-sectional shape of the cross fin, and the degree of freedom of the cross-sectional shape is increased.

【0034】更に、上記のように平板状のシート材にク
ロスフィンを固定できるので、任意の位置に任意の個数
のクロスフィンを配置することも容易であり、また、ク
ロスフィンを、その稜線と管軸とに所望の角度をもって
配置することも容易である。
Further, since the cross fins can be fixed to the flat sheet material as described above, it is easy to arrange an arbitrary number of cross fins at an arbitrary position. It is also easy to arrange at a desired angle with the tube axis.

【0035】更に、管が1巻き状態であるため、従来の
うず巻き断面の製法に比べて、シート材の使用量を必要
最小限にして重量軽減及び材料費低減を図ることがで
き、かつ、流体の流通抵抗も軽減できる。
Further, since the pipe is in a single-wound state, the amount of sheet material used can be minimized to reduce the weight and material cost as compared with the conventional method of manufacturing a spiral cross section, and the fluid can be reduced. Distribution resistance can be reduced.

【0036】請求項2記載の発明によれば、更に、一般
的なプレス成形機を使用して加工できるので、従来のよ
うな引き抜き加工の型等のような特殊な型や工法及び工
程が不要で、作業性が良く、製造コストも安くなる。
According to the second aspect of the present invention, since the processing can be performed using a general press molding machine, a special mold, a construction method and a process such as a conventional drawing die are not required. Therefore, workability is good and manufacturing cost is low.

【0037】請求項3記載の発明によれば、更にU字曲
げ時において、第1のパンチにおける凸型面によりフィ
ン素材を押し潰すことがない。そのためフィン素材の波
形を変形することなく良好なU字曲げが行える。
According to the third aspect of the present invention, the fin material is not crushed by the convex surface of the first punch during the U-shaped bending. Therefore, good U-shaped bending can be performed without deforming the waveform of the fin material.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の製造方法により製造するクロスフィン
チューブを示すもので、(a)は側断面図、(b)は
(a)におけるA−A線断面図。
FIG. 1 shows a cross fin tube manufactured by the manufacturing method of the present invention, in which (a) is a side sectional view, and (b) is a sectional view taken along line AA in (a).

【図2】本発明の製造工程を示すもので、(a)は管の
素材である平板状のシート材に波板状のフィン素材を固
着した図、(b)はU曲げ工程を示す図、(c)は円形
曲げ工程を示す図。
2A and 2B show a manufacturing process of the present invention, in which FIG. 2A is a diagram in which a corrugated fin material is fixed to a flat sheet material as a tube material, and FIG. 2B is a diagram showing a U-bending process. (C) is a diagram showing a circular bending step.

【図3】図2(a)の平面図で、フィン素材を3個配置
した図。
FIG. 3 is a plan view of FIG. 2A, in which three fin materials are arranged.

【図4】フィン素材を、その稜線方向が管軸方向に対し
て傾斜するように配置した他の例を示すもので、(a)
は平面図、(b)は(a)の右側面図。
FIG. 4 shows another example in which the fin material is arranged so that its ridge line direction is inclined with respect to the tube axis direction.
Is a plan view, and (b) is a right side view of (a).

【図5】本発明の製造方法の他の例を示すもので、
(a)は曲げ加工前の状態、(b)は曲げ加工状態を示
す図。
FIG. 5 shows another example of the production method of the present invention.
(A) is a figure before bending, (b) is a figure showing a bent state.

【図6】本発明により製造されたクロスフィンチューブ
の使用例を示すもので、(a)は側断面図、(b)は
(a)のB−B線断面図。
6A and 6B show an example of use of a cross fin tube manufactured according to the present invention, wherein FIG. 6A is a side sectional view, and FIG. 6B is a sectional view taken along line BB of FIG.

【図7】本発明により製造されたクロスフィンチューブ
を自動車のEGRパイプに使用した例を示す側面図。
FIG. 7 is a side view showing an example in which the cross fin tube manufactured according to the present invention is used for an EGR pipe of an automobile.

【符号の説明】[Explanation of symbols]

1c…シート材 1f…両端 2b…フィン素材 6…凹型面 7…ダイ 8…凸型面 9…第1のパンチ 10…凹型面 11…ダイ 12…凹型面 13…第2のパンチ 1c ... Sheet material 1f ... Both ends 2b ... Fin material 6 ... Concave surface 7 ... Die 8 ... Convex surface 9 ... First punch 10 ... Concave surface 11 ... Die 12 ... Concave surface 13 ... Second punch

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 シート材に波板状のフィン素材を載置し
てその両者の接合部を固定し、次に上記シート材を、フ
ィン素材が内側となるように略U字断面形状に曲げた後
に円断面形状に形成し、次で上記シート材の曲げ方向の
両端を密着接合することを特徴とするクロスフィンチュ
ーブの製造方法。
1. A corrugated fin material is placed on a sheet material to fix a joint between the two, and then the sheet material is bent into a substantially U-shaped cross-section so that the fin material is on the inside. Forming a circular cross-sectional shape, and then closely bonding both ends of the sheet material in the bending direction.
【請求項2】 略U字状断面形状への曲げ加工を、半円
状の凹型面を有するダイと、略U字状の凸型面を有する
第1のパンチで行い、円断面形状への曲げ加工を、半円
状の凹型面を有するダイと、略U字状の凹型面を有する
第2のパンチで行うようにした請求項1記載のクロスフ
ィンチューブの製造方法。
2. A bending process into a substantially U-shaped cross-sectional shape is performed using a die having a semicircular concave surface and a first punch having a substantially U-shaped convex surface to form a circular cross-sectional shape. The method for manufacturing a cross-fin tube according to claim 1, wherein the bending is performed by a die having a semicircular concave surface and a second punch having a substantially U-shaped concave surface.
【請求項3】 第1のパンチにおける凸型面が、フィン
素材を有しない部分に配置され、該凸型面がシート材を
直接折曲するようにした請求項2記載のクロスフィンチ
ューブの製造方法。
3. The production of a cross fin tube according to claim 2, wherein the convex surface of the first punch is arranged at a portion having no fin material, and the convex surface directly bends the sheet material. Method.
JP33812596A 1996-12-18 1996-12-18 Production of cross-fin tube Withdrawn JPH10185480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33812596A JPH10185480A (en) 1996-12-18 1996-12-18 Production of cross-fin tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33812596A JPH10185480A (en) 1996-12-18 1996-12-18 Production of cross-fin tube

Publications (1)

Publication Number Publication Date
JPH10185480A true JPH10185480A (en) 1998-07-14

Family

ID=18315157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33812596A Withdrawn JPH10185480A (en) 1996-12-18 1996-12-18 Production of cross-fin tube

Country Status (1)

Country Link
JP (1) JPH10185480A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012169915A1 (en) * 2011-06-10 2012-12-13 Aic Spółka Akcyjna Heat exchanger tube
US10577996B2 (en) 2017-12-20 2020-03-03 Caterpillar Inc. Exhaust conduit with a flow conditioning portion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012169915A1 (en) * 2011-06-10 2012-12-13 Aic Spółka Akcyjna Heat exchanger tube
US10577996B2 (en) 2017-12-20 2020-03-03 Caterpillar Inc. Exhaust conduit with a flow conditioning portion

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