JP6867912B2 - Heat exchanger manufacturing method and heat exchanger - Google Patents

Heat exchanger manufacturing method and heat exchanger Download PDF

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JP6867912B2
JP6867912B2 JP2017155601A JP2017155601A JP6867912B2 JP 6867912 B2 JP6867912 B2 JP 6867912B2 JP 2017155601 A JP2017155601 A JP 2017155601A JP 2017155601 A JP2017155601 A JP 2017155601A JP 6867912 B2 JP6867912 B2 JP 6867912B2
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flat tube
ridge portion
ridge
insertion hole
flat
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芳光 小川
芳光 小川
藤田 宏
宏 藤田
さおり 夫馬
さおり 夫馬
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T.RAD CO., L T D.
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Description

本発明は主として、薄い条材の両縁を互いに巻締めて偏平チューブを形成し、それをヘッダプレートの挿通孔に挿入して、両者間をろう付して固定するものに関する。 The present invention mainly relates to a method in which both edges of a thin strip are wound together to form a flat tube, which is inserted into an insertion hole of a header plate and brazed and fixed between the two.

条材の端部どうしを重ね合わせて、巻締部を形成した偏平チューブが知られている。下記特許文献1に記載の熱交換器用偏平チューブは、一対のプレートの両縁に設けた横断面U字状部を互いに嵌着し、その嵌着部を巻締めて固定したものである。
また、条材の両縁部を折り返して、その端部どうしを横断面H字状に接続したものも知られている。これは条材の中間部に仕切用の立上げ部を形成し、その頂部を条材の中間部内面に接続したものである。この条材の外面側には予めろう材が被覆されている。
このようにしてなる偏平チューブは、その外周に整合するチューブ挿通孔を有するヘッダプレートに挿通され、偏平チューブとヘッダプレートとの間が、高温の炉内で一体的にろう付固定される。
A flat tube is known in which the ends of strips are overlapped with each other to form a winding tightening portion. The flat tube for a heat exchanger described in Patent Document 1 below has U-shaped cross-sectional portions provided on both edges of a pair of plates fitted to each other, and the fitted portions are wound and fixed.
It is also known that both edges of the strip are folded back and the ends are connected to each other in an H-shaped cross section. In this method, a rising portion for partitioning is formed in the middle portion of the strip material, and the top portion thereof is connected to the inner surface of the intermediate portion of the strip material. The outer surface side of this strip is coated with a brazing material in advance.
The flat tube thus formed is inserted into a header plate having a tube insertion hole matching the outer circumference thereof, and the flat tube and the header plate are integrally brazed and fixed in a high-temperature furnace.

特開2017−058065号公報Japanese Unexamined Patent Publication No. 2017-058065

偏平チューブの外周に整合するチューブ挿通孔は、通常、プレス成形により孔縁部がバーリング加工されている。即ち、チューブ挿通孔の孔縁部はタンクの内部側に突出する筒状に形成されている。このようなバーリング加工部に偏平チューブを挿通し、一体的にろう付固定する時、特に、偏平チューブの継目にろう付不良が生じることがある。
このような偏平チューブに対して本発明の発明者による、ろう付不良の原因究明の結果、挿通孔の横断面の偏平チューブに接触する剪断部が図8の如く、僅かに波打っている波打面28が形成される場合に、その部分でろう付不良が生じることが判った。特に、偏平チューブの巻締部等の条材の継目において、チューブ挿通孔の剪断部にスムーズでない波打面28が形成されると、それらにより形成される隙間からろう材が流出してろう付不良が生じていた。
そこで、本発明は特に、ヘッダプレートと偏平チューブの接合部におけるろう付不良を防止することを目的とする。
The tube insertion hole that matches the outer circumference of the flat tube is usually press-formed to burring the hole edge. That is, the hole edge of the tube insertion hole is formed in a tubular shape protruding toward the inside of the tank. When a flat tube is inserted into such a burring processed portion and brazed and fixed integrally, brazing defects may occur at the joint of the flat tube.
As a result of investigating the cause of brazing failure by the inventor of the present invention for such a flat tube, a wave in which the sheared portion in contact with the flat tube in the cross section of the insertion hole is slightly wavy as shown in FIG. It was found that when the striking surface 28 is formed, brazing defects occur at that portion. In particular, when a non-smooth wavy surface 28 is formed in the sheared portion of the tube insertion hole at the seam of the strip material such as the winding portion of the flat tube, the brazing material flows out from the gap formed by them and brazes. There was a defect.
Therefore, it is an object of the present invention to prevent brazing defects at the joint between the header plate and the flat tube.

請求項1に記載の発明は、ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されると共に、その偏平チューブ(3)はその横断面の長軸方向の端部に巻締接合部(4)を有するものであって、
ヘッダプレート(1)に、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の両端部に隣接した両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、を一対ずつ形成して、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)を形成する前工程と、
次いで、その第1突条部(5)の中心線上で、その外面側から内面側に穿孔して、偏平チューブ(3)の外周に整合する立上げリブ(11)を形成すると共に、前記剛性部(7)に隣接する立上げリブ(11)の内面をヘッダプレート(1)の平面に直交する平坦面(8)に形成する穿孔工程と、
前記巻締接合部(4)を前記剛性部(7)における平坦面(8)に位置して、偏平チューブ(3)と挿通孔(2)との間をろう付するろう付工程と、
を具備することを特徴とする熱交換器の製造方法である。
In the invention according to claim 1, the end portion of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the flat tube (3) are inserted. The flat tube (3) has a winding joint (4) at the end in the longitudinal direction of its cross section while being brazed and fixed to the end of the tube.
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The second ridge portion whose cross section is curved inwardly perpendicular to the first ridge portion (5) so that the end portion enters the first ridge portion (5) on both sides adjacent to both ends of the (6) and the previous step of forming a pair of each, and forming a rigid portion (7) at the connecting portion between the first ridge portion (5) and the second ridge portion (6).
Next, on the center line of the first ridge portion (5), a hole is formed from the outer surface side to the inner surface side thereof to form a rising rib (11) consistent with the outer circumference of the flat tube (3), and the rigidity is described. A drilling step of forming the inner surface of the rising rib (11) adjacent to the portion (7) on a flat surface (8) orthogonal to the plane of the header plate (1).
A brazing step in which the winding joint portion (4) is located on a flat surface (8) in the rigid portion (7) and is brazed between the flat tube (3) and the insertion hole (2).
This is a method for manufacturing a heat exchanger, which comprises the above.

請求項2に記載の発明は、ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されると共に、その偏平チューブ(3)はその横断面の長軸方向の中間位置に中間接合部(9)を有するものであって、
ヘッダプレート(1)に、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の中間に隣接した両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、を一対ずつ形成して、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)を形成する前工程と、
次いで、その第1突条部(5)の中心線上で、その外面側から内面側に穿孔して、偏平チューブ(3)の外周に整合する立上げリブ(11)を形成すると共に、前記剛性部(7)に隣接した立上げリブ(11)の内面をヘッダプレート(1)の平面に直交する平坦面(8)に形成する穿孔工程と、
前記中間接合部(9)を前記平坦面(8)に位置して、偏平チューブ(3)と挿通孔(2)との間をろう付するろう付工程と、
を具備することを特徴とする熱交換器の製造方法である。
In the invention according to claim 2, the end portion of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the flat tube (3) are inserted. The flat tube (3) has an intermediate joint (9) at an intermediate position in the longitudinal direction of its cross section while being brazed and fixed to the end of the tube.
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The second ridge (5) whose cross section is curved inwardly perpendicular to the first ridge (5) so that the end enters the first ridge (5) on both sides adjacent to the middle of the 6) and the previous step of forming a pair of each and forming a rigid portion (7) at the connecting portion between the first ridge portion (5) and the second ridge portion (6).
Next, on the center line of the first ridge portion (5), a hole is formed from the outer surface side to the inner surface side thereof to form a rising rib (11) consistent with the outer circumference of the flat tube (3), and the rigidity is described. A drilling step of forming the inner surface of the rising rib (11) adjacent to the portion (7) on a flat surface (8) orthogonal to the plane of the header plate (1).
A brazing step in which the intermediate joint (9) is located on the flat surface (8) and brazed between the flat tube (3) and the insertion hole (2).
This is a method for manufacturing a heat exchanger, which comprises the above.

請求項3に記載の発明は、前記穿孔に伴い第1突条部(5)の両端部および剛性部(7)の位置に、他の部分に比べて孔縁部をより高く且つ、前記平坦面(8)の高さを他の部分よりも高く形成した請求項1または請求項2に記載の熱交換器の製造方法である。 According to the third aspect of the present invention, the hole edge portion is higher and flatter than the other portions at the positions of both ends of the first ridge portion (5) and the rigid portion (7) due to the perforation. The method for manufacturing a heat exchanger according to claim 1 or 2, wherein the height of the surface (8) is formed higher than that of other portions.

請求項4に記載の発明は、前記前工程と穿孔工程との中間に、偏平チューブの幅に比べて狭い幅のスリット(12)を形成する工程を設けたことを特徴とする請求項1または請求項2に記載の熱交換器の製造方法である。 The invention according to claim 4 is characterized in that a step of forming a slit (12) having a width narrower than the width of the flat tube is provided between the previous step and the drilling step. The method for manufacturing a heat exchanger according to claim 2.

請求項5に記載の発明は、ヘッダプレートは、第1突条部(5)の長手方向の中間と両端とに隣接した両側の位置で、予めその内面側に湾曲する3本以上の第2突条部(6)および剛性部(7)をそれぞれ形成しておく前工程を有する請求項1乃至請求項4のいずれかに記載の熱交換器の製造方法である。 According to the fifth aspect of the present invention, the header plate has three or more second head plates that are curved in advance toward the inner surface side of the first ridge portion (5) at positions on both sides adjacent to the middle and both ends in the longitudinal direction. The method for manufacturing a heat exchanger according to any one of claims 1 to 4, further comprising a pre-process for forming the ridge portion (6) and the rigid portion (7), respectively.

請求項6に記載の発明は、ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されていると共に、その偏平チューブ(3)はその横断面の長軸方向の端部に巻締接合部(4)又はその横断面の長軸方向の中間位置に中間接合部(9)を有するものであって、
ヘッダプレート(1)は、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の両端部又は長手方向の中間に隣接する両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、が一対ずつ形成されており、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)が形成されており、
前記第1突条部(5)の中心線上には、偏平チューブ(3)の外周に整合する立上げリブ(11)を有する挿通孔(2)が穿孔されていると共に、前記剛性部(7)に隣接した立上げリブ(11)の内面にヘッダプレート(1)の平面に直交する平坦面(8)が形成されている構造を有しており、
前記偏平チューブ(3)の巻締接合部(4)又は中間接合部(9)が前記剛性部(7)における平坦面(8)に位置した状態で、偏平チューブ(3)とヘッダプレート(1)の挿通孔(2)との間がろう付固定されていることを特徴とする熱交換器である。
In the invention according to claim 6, the end portion of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the flat tube (3) are inserted. The flat tube (3) is brazed and fixed to the end of the cross section, and the flat tube (3) is attached to the end of the cross section in the long axis direction at the winding joint (4) or the middle of the cross section in the long axis direction. It has an intermediate joint (9) at the position and has an intermediate joint (9).
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The cross section is curved toward the inner surface side orthogonal to the first ridge portion (5) so that the end portion enters the first ridge portion (5) on both ends or both sides adjacent to the middle in the longitudinal direction. A pair of the second ridge portion (6) is formed, and a rigid portion (7) is formed at the connecting portion between the first ridge portion (5) and the second ridge portion (6). Orthogonal
An insertion hole (2) having a rising rib (11) aligned with the outer circumference of the flat tube (3) is formed on the center line of the first ridge portion (5), and the rigid portion (7) is formed. ), A flat surface (8) orthogonal to the plane of the header plate (1) is formed on the inner surface of the rising rib (11).
The flat tube (3) and the header plate (1) are in a state where the brazing joint (4) or the intermediate joint (9) of the flat tube (3) is located on the flat surface (8) of the rigid portion (7). ) Is a heat exchanger characterized by being brazed and fixed to the insertion hole (2).

請求項1に記載の発明は、偏平チューブの横断面の長軸方向の端部に巻締接合部4が形成されたものを対象とし、その巻締部とチューブ挿通孔とのろう付の信頼性を向上するものである。
そのために、その第1突条部と第2突条部との接続部に剛性部7を形成する前工程と、続く穿孔で、剛性部7における剪断面14をヘッダプレート1の平面に直交する平坦な面8に形成し、その剛性部7における平坦面8に偏平チューブの巻締接合部4の外面に生じる継目15を配置して、両者間をろう付するものである。
その平坦面8は剛性部7の剛性のため、スムーズな面を形成し、そこに配置される巻締接合部4の継目15との間の隙間を限りなく小さくしたので、そこに配置される巻締接合部4の継目15からのろう材の流出を平坦面8が阻止し、ろう付の信頼性を確保できる。
The invention according to claim 1 is intended for a flat tube having a winding joint 4 formed at an end portion in the longitudinal direction of a cross section of a flat tube, and reliability of brazing between the winding portion and the tube insertion hole. It improves sex.
Therefore, in the pre-step of forming the rigid portion 7 at the connecting portion between the first ridge portion and the second ridge portion and the subsequent drilling, the shear cross section 14 of the rigid portion 7 is orthogonal to the plane of the header plate 1. It is formed on a flat surface 8, and a seam 15 formed on the outer surface of the winding joint portion 4 of the flat tube is arranged on the flat surface 8 of the rigid portion 7 to braze between the two.
Since the flat surface 8 is rigid of the rigid portion 7, a smooth surface is formed, and the gap between the flat surface 8 and the seam 15 of the brazing joint 4 arranged there is made as small as possible, so that the flat surface 8 is arranged there. The flat surface 8 prevents the brazing material from flowing out from the seam 15 of the winding joint portion 4, and the reliability of brazing can be ensured.

請求項2に記載の発明は、偏平チューブ1の横断面の長手方向の中間位置に中間接合部9を有するものを対象とし、その接合部9と挿通孔2とのろう付の信頼性を向上するものである。
そして、剛性部7の存在により穿孔に伴う剪断面14をヘッダプレート1の平面に直交する平坦な面8に形成し、その平坦面8に偏平チューブの中間接合部9の外面に生じる継目15を配置して、両者間をろう付するものである。このとき、中間接合部9の継目15が平坦面8に位置することによりそれらの間の隙間を限りなく小さくしているので、ろう付中のろう材の流出を平坦面8が阻止し、ろう付の信頼性を確保できる。
The invention according to claim 2 is intended to have an intermediate joint portion 9 at an intermediate position in the longitudinal direction of the cross section of the flat tube 1, and improves the reliability of brazing between the joint portion 9 and the insertion hole 2. It is something to do.
Then, due to the presence of the rigid portion 7, the sheared cross section 14 associated with the drilling is formed on the flat surface 8 orthogonal to the plane of the header plate 1, and the seam 15 formed on the outer surface of the intermediate joint portion 9 of the flat tube is formed on the flat surface 8. It is arranged and brazed between the two. At this time, since the seam 15 of the intermediate joint portion 9 is located on the flat surface 8 to make the gap between them as small as possible, the flat surface 8 prevents the brazing material from flowing out during brazing, and the brazing Brazing reliability can be ensured.

請求項3に記載の発明は、前記剛性部7における前記平坦面8の高さを他の部分よりも高く形成したので、巻締接合部4または中間接合部9と挿通孔2とのろう付長さを長く確保し、ろう付の信頼性を向上できる。 In the invention according to claim 3, since the height of the flat surface 8 in the rigid portion 7 is formed higher than the other portions, brazing of the winding joint portion 4 or the intermediate joint portion 9 and the insertion hole 2 is performed. The length can be secured and the reliability of brazing can be improved.

請求項4に記載の発明は、前工程と穿孔工程との中間に、偏平チューブの幅に比べて狭い幅のスリットを形成する工程を設けたので、剛性部7における剪断面14を平坦な面8に正確に形成できる。そのため、巻締接合部4または中間接合部9と挿通孔2とのろう付の信頼性をさらに向上できる。 According to the fourth aspect of the present invention, since a step of forming a slit having a width narrower than the width of the flat tube is provided between the previous step and the drilling step, the sheared surface 14 of the rigid portion 7 is formed on a flat surface. It can be formed exactly at 8. Therefore, the reliability of brazing between the winding joint 4 or the intermediate joint 9 and the insertion hole 2 can be further improved.

請求項5に記載の発明は、ヘッダプレートの第1突条部5の中間と両端とに隣接した両側の位置で、予めその内面側に湾曲する3本以上の第2突条部6および剛性部7をそれぞれ形成したものである。このヘッダプレート1を使用すれば、巻締接合部4を有する偏平チューブにも、中間接合部9を有する場合、中間接合部9を1つの偏平チューブ内に多数有する場合のいずれにも使用でき、汎用性の高い熱交換器の製造方法を提供できる。 The invention according to claim 5 is a header plate having three or more second ridges 6 and rigidity which are curved in advance toward the inner surface at positions on both sides adjacent to the middle and both ends of the first ridge 5 of the header plate. Each part 7 is formed. If this header plate 1 is used, it can be used for a flat tube having a winding joint 4, a case where it has an intermediate joint 9, and a case where it has a large number of intermediate joints 9 in one flat tube. It is possible to provide a highly versatile method for manufacturing a heat exchanger.

請求項6に記載の発明は、偏平チューブの横断面の長軸方向の端部に巻締接合部4が形成されたもの又は中間位置に中間接合部9が形成されたものを対象とし、その巻締接合部4又は中間接合部9とチューブ挿通孔2とのろう付の信頼性を向上するものである。
そのために、ヘッダプレート1の平面には第1突条部5と第2突条部6が設けられ、その接続部に剛性部7が形成され、その第1突条部5の中心線上に、偏平チューブ3の外周に整合する立上げリブ11を有する挿通孔2が穿孔され、剛性部7に隣接した立上げリブ11の内面にヘッダプレート1の平面に直交する平坦面8が形成されている構造を有しており、その剛性部7における平坦面8に偏平チューブ3の巻締接合部4又は中間接合部9を配置して、偏平チューブ3とヘッダプレート1の両者間がろう付されている構造を有している。
その平坦面8はその隣接位置に設けられた剛性部7の存在により、滑らかな面に形成されているので、そこに配置される偏平チューブ3の巻締接合部4又は中間接合部9の外面に生じる継目15との間の隙間を小さくすることができる。それ故、そこに配置される継目15からのろう材の流出を防止し、ろう付の信頼性の高い熱交換器となる。
The invention according to claim 6 is intended for a flat tube having a brazing joint 4 formed at an end portion in the longitudinal direction of a cross section of a flat tube or an intermediate joint 9 formed at an intermediate position. This is intended to improve the reliability of brazing between the winding joint portion 4 or the intermediate joint portion 9 and the tube insertion hole 2.
Therefore, a first ridge portion 5 and a second ridge portion 6 are provided on the flat surface of the header plate 1, a rigid portion 7 is formed at the connecting portion thereof, and a rigid portion 7 is formed on the center line of the first ridge portion 5. An insertion hole 2 having a rising rib 11 aligned with the outer circumference of the flat tube 3 is drilled, and a flat surface 8 orthogonal to the plane of the header plate 1 is formed on the inner surface of the rising rib 11 adjacent to the rigid portion 7. It has a structure, and the winding joint portion 4 or the intermediate joint portion 9 of the flat tube 3 is arranged on the flat surface 8 of the rigid portion 7, and both the flat tube 3 and the header plate 1 are brazed. Has a structure.
Since the flat surface 8 is formed on a smooth surface due to the presence of the rigid portion 7 provided at the adjacent position thereof, the outer surface of the winding joint portion 4 or the intermediate joint portion 9 of the flat tube 3 arranged therein is formed. The gap between the seam 15 and the seam 15 can be reduced. Therefore, it prevents the brazing material from flowing out from the seam 15 arranged there, and becomes a highly reliable heat exchanger with brazing.

本発明の熱交換器のヘッダプレート1の平面図(A)、図1(A)のB−B断面図(B)、図1(A)のC−C断面図(C)、図1(A)のD−D断面図(D)、図1(A)のE−E断面図(E)。Plan view (A) of header plate 1 of the heat exchanger of the present invention, BB sectional view (B) of FIG. 1 (A), CC sectional view (C) of FIG. 1 (A), FIG. 1 ( A cross-sectional view taken along the line DD (D) and FIG. 1 (A) taken along the line E-E. 同ヘッダプレートを製造するための第1工程(前工程)の平面図(A)、図2(A)のB−B断面図(B)。A plan view (A) of a first step (preliminary step) for manufacturing the header plate, and a sectional view (B) of BB of FIG. 2 (A). 同ヘッダプレートのチューブ挿通孔の穿孔工程の手順の一例を示す説明図であって、A1及びA2は第2工程の穿孔工程の補助工程を示す平面図と断面図であり、B1及びB2は第2工程の穿孔工程の主工程を示す平面図と断面図。It is explanatory drawing which shows an example of the procedure of the process of drilling the tube insertion hole of the header plate, A1 and A2 are the plan view and sectional view which show the auxiliary process of the drilling process of 2nd step, and B1 and B2 are the 1st A plan view and a cross-sectional view showing the main steps of the two-step drilling step. 同工程により形成されたヘッダプレートのバーリング加工部の要部斜視図。The main part perspective view of the burring processed part of the header plate formed by the same process. 同ヘッダプレートのチューブ挿通孔に端部巻締型の偏平チューブを挿通した状態を示す平面図(A)、図5(A)のB部拡大図(B)、図5(B)のD−D断面図(C)。A plan view (A) showing a state in which an end-wrapping type flat tube is inserted into the tube insertion hole of the header plate, an enlarged view (B) of part B of FIG. 5 (A), and D- of FIG. 5 (B). D sectional view (C). 同チューブ挿通孔に偏平チューブ3として、その横断面の中央位置に中間接合部9を設けた場合のろう付状態を示す平面図(A)及び図6(A)のB部拡大図(B)。A plan view (A) and an enlarged view (B) of the B portion of FIGS. 6 (A) showing a brazed state when an intermediate joint portion 9 is provided at the center position of the cross section of the flat tube 3 in the tube insertion hole. .. 図5(B)のD−D線における偏平チューブを挿通する前のバーリング加工部の拡大断面図。FIG. 5 (B) is an enlarged cross-sectional view of a burring processed portion before inserting the flat tube in the DD line of FIG. 5 (B). 従来型ヘッダプレートのチューブ挿通孔のバーリング加工部の拡大断面図。Enlarged sectional view of the burring portion of the tube insertion hole of the conventional header plate.

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。
なお、各発明のヘッダプレート1の平面に対する内面側とは、ヘッダプレート1の外周壁の立ち上げ側、図示しないヘッダタンクの内部に向かせる面の側、若しくは平面に対して第1突条部5が突設される側をいう。
図1は、図5に示すような横断面の両端部に巻締接合部4を有する偏平チューブ3とヘッダプレート1とのろう付に最適な熱交換器のヘッダプレート1である。この第1実施形態の熱交換器に用いられる偏平チューブ3は、一対の条材をその両縁部で横断面U字状に嵌着して、その嵌着部を巻締ることによって接続されている。
Next, an embodiment of the present invention will be described with reference to the drawings.
The inner surface side of the header plate 1 of each invention with respect to the flat surface is the rising side of the outer peripheral wall of the header plate 1, the side of the surface facing the inside of the header tank (not shown), or the first ridge portion with respect to the flat surface. Refers to the side on which 5 is projected.
FIG. 1 is a header plate 1 of a heat exchanger that is most suitable for brazing a flat tube 3 having winding joints 4 at both ends of a cross section as shown in FIG. 5 and a header plate 1. The flat tube 3 used in the heat exchanger of the first embodiment is connected by fitting a pair of strips at both edges in a U-shaped cross section and winding the fitting portion. ing.

このヘッダプレート1の構造は、次のようになっている。
ヘッダプレート1の平面には、その長手方向に向かって、横断面が内面側に湾曲する多数の細長い第1突条部5が定間隔に並列して突設されている。そして、各第1突条部5の中心線上に偏平チューブ3の外周に整合するように、挿通孔2が穿孔されている。
また、第1突条部5の偏平チューブ3の巻締接合部4に隣接した位置の両側に、第1突条部5に直交して内面側に横断面が湾曲する第2突条部6と、が一対ずつ形成されている。その第2突条部6の端部は第1突条部5内に入り込むように形成されており、その第1突条部5と第2突条部6との接続部には剛性部7が形成されている。
各挿通孔2の孔縁には立上げリブ11が形成されており、剛性部7に隣接した立上げリブ11の内面には、ヘッダプレート1の平面に直交する滑らかな平坦面8が形成されている。
The structure of the header plate 1 is as follows.
On the plane of the header plate 1, a large number of elongated first ridges 5 whose cross sections are curved inward are projected in parallel at regular intervals in the longitudinal direction thereof. Then, an insertion hole 2 is formed on the center line of each first ridge portion 5 so as to be aligned with the outer circumference of the flat tube 3.
Further, the second ridge portion 6 whose cross section is curved inwardly orthogonal to the first ridge portion 5 on both sides of the flat tube 3 of the first ridge portion 5 adjacent to the winding joint portion 4. And are formed in pairs. The end portion of the second ridge portion 6 is formed so as to enter into the first ridge portion 5, and a rigid portion 7 is formed at the connection portion between the first ridge portion 5 and the second ridge portion 6. Is formed.
A rising rib 11 is formed on the hole edge of each insertion hole 2, and a smooth flat surface 8 orthogonal to the plane of the header plate 1 is formed on the inner surface of the rising rib 11 adjacent to the rigid portion 7. ing.

この例のヘッダプレート1の挿通孔2には、図5に示すような巻締嵌着部4を有する偏平チューブ3の端部が挿通されている。巻締接合部4はその偏平チューブ3の外周に継目15を有しており、その継目15がヘッダプレート1の立ち上げリブ11の滑らかな平坦面8に位置した状態で、偏平チューブ3とヘッダプレート1の挿通孔2との間がろう付接合されている。
このような特徴を有する熱交換器は、ヘッダプレート1の挿通孔2と巻締接合部4の継目15との間の隙間を限りなく小さくし、そこに配置される巻締接合部4からのろう材の流出を阻止することができる。また、第2突条部6及び剛性部7が偏平チューブ3の巻締接合部4に隣接した位置の両側に存在しているので、各挿通孔2の平坦面8と偏平チューブ3の継目15の位置を確認する必要がない。
The end of the flat tube 3 having the winding and fitting portion 4 as shown in FIG. 5 is inserted into the insertion hole 2 of the header plate 1 of this example. The brazing joint 4 has a seam 15 on the outer periphery of the flat tube 3, and the flat tube 3 and the header are in a state where the seam 15 is located on the smooth flat surface 8 of the rising rib 11 of the header plate 1. It is brazed and joined to the insertion hole 2 of the plate 1.
The heat exchanger having such a feature makes the gap between the insertion hole 2 of the header plate 1 and the seam 15 of the winding joint 4 as small as possible, and from the winding joint 4 arranged there. The outflow of brazing material can be prevented. Further, since the second ridge portion 6 and the rigid portion 7 are present on both sides of the flat tube 3 adjacent to the winding joint portion 4, the flat surface 8 of each insertion hole 2 and the joint 15 of the flat tube 3 are present. There is no need to confirm the position of.

図1に例示されたヘッダプレート1の平面の周縁には、内面側に立ち上げられた外周壁が形成されている。
ヘッダプレート1の外周壁の内周面には図示しないヘッダタンクの端部が載置され、ヘッダプレートの周壁をカシメることにより(カシメ固定の構造は公知のものを採用できる。)、ヘッダタンクとヘッダプレートを接続する。また、各偏平チューブ3の間には、図示しないアウターフィンが設けられる。
On the peripheral edge of the plane of the header plate 1 illustrated in FIG. 1, an outer peripheral wall raised on the inner surface side is formed.
An end of a header tank (not shown) is placed on the inner peripheral surface of the outer peripheral wall of the header plate 1, and by caulking the peripheral wall of the header plate (a known structure for fixing the caulking can be adopted). And connect the header plate. Further, outer fins (not shown) are provided between the flat tubes 3.

この例のヘッダプレート1の挿通孔2は、図2及び図3のように順次、成形される。
ヘッダプレート1は、バーリング加工を施す準備として第1突条部5と第2突条部6を形成する前工程を行う。図2(A)及び図2(B)に示す如く、細長い第1突条部5がヘッダプレート1の平面の長手方向に定間隔に並列されている。第1突条部5はその横断面が内面側に突出する円弧状に形成されている。そして、第1突条部5の両端部に隣接した両側縁に、第1突条部5に直交して、第2突条部6が平面と一体に突設されている。この第2突条部6は、ヘッダプレート1の内面側に湾曲する。そして、第1突条部5と第2突条部6とが隣接する位置に剛性部7が形成される。剛性部7は、偏平チューブ3の巻締接合部4により生じる継目15の位置に整合するように形成される。
この剛性部7は両突条部5、6の境にあるため、機械的剛性が強く、プレス成形による剪断に際して、その位置にある剪断面14が図7に示す如く、滑らかな平坦面8として形成される。
The insertion holes 2 of the header plate 1 of this example are sequentially formed as shown in FIGS. 2 and 3.
The header plate 1 is subjected to a pre-process for forming the first ridge portion 5 and the second ridge portion 6 in preparation for burring. As shown in FIGS. 2A and 2B, elongated first ridges 5 are arranged in parallel at regular intervals in the longitudinal direction of the plane of the header plate 1. The first ridge portion 5 is formed in an arc shape whose cross section projects inward. Then, the second ridge portion 6 is projected integrally with the flat surface on both side edges adjacent to both ends of the first ridge portion 5 at right angles to the first ridge portion 5. The second ridge portion 6 is curved toward the inner surface side of the header plate 1. Then, the rigid portion 7 is formed at a position where the first ridge portion 5 and the second ridge portion 6 are adjacent to each other. The rigid portion 7 is formed so as to be aligned with the position of the seam 15 generated by the winding joint portion 4 of the flat tube 3.
Since the rigid portion 7 is located at the boundary between the two ridge portions 5 and 6, the mechanical rigidity is strong, and when shearing by press molding, the shearing cross section 14 at that position is formed as a smooth flat surface 8 as shown in FIG. It is formed.

次に、前工程を行ったヘッダプレート1の内面側を下向きにして、図示しない補助工程のプレス金型10に使用されるダイの上に配置する。そして、図3(A1)及び図3(A2)に示す如く、先端部10aに切断部を有する補助工程のプレス金型10のパンチにより、ヘッダプレート1の第1突条部5の中心線上に狭いスリット12を形成する。補助工程のプレス金型10のダイには、スリット12を穿孔するための孔が設けられる。この補助工程のプレス金型10のパンチの先端部10aは、側面が偏平に形成され且つ、その先端部10aが鋭利に形成されている。 Next, the header plate 1 subjected to the previous step is placed on a die used for the press die 10 in the auxiliary step (not shown) with the inner surface side facing downward. Then, as shown in FIGS. 3 (A1) and 3 (A2), the punch of the press die 10 in the auxiliary step having the cut portion at the tip portion 10a causes the header plate 1 to be on the center line of the first ridge portion 5. A narrow slit 12 is formed. The die of the press die 10 in the auxiliary process is provided with a hole for drilling the slit 12. The side surface of the punch tip portion 10a of the press die 10 in this auxiliary step is formed flat and the tip portion 10a is sharply formed.

次に、第2工程(穿孔工程)の主工程(バーリング)を行う。補助工程を行ったヘッダプレート1の内面側を下向きにして、図示しない主工程のプレス金型13のダイの上に配置する。そして、図3(B1)及び図3(B2)に示す如く、主工程のプレス金型13を外面側から内面側にプレスすることによってスリット12が拡開される。この主工程のプレス金型13のパンチは、横断面が偏平でその先端部13aが弧状に形成されている。そして、この先端部13aによって、スリット12が拡開されて、挿通孔2の立上げ部11を形成するともに、その内面にヘッダプレート1の平面16に直行する剪断面14が形成される。この時、特に、第1突条部5と第2突条部6との接続部である剛性部7の近傍では、その剛性により、図1(D)及び図3(B2)に示す如く、剪断面14が滑らかな平坦面8として形成される。即ち、対向する平坦面8はその平面どうしが、ヘッダプレート1の平面に対し垂直であり、それらの面が平行で且つ滑らかである。 Next, the main step (burring) of the second step (drilling step) is performed. The header plate 1 subjected to the auxiliary process is placed on a die of a press die 13 of a main process (not shown) with the inner surface side facing downward. Then, as shown in FIGS. 3 (B1) and 3 (B2), the slit 12 is expanded by pressing the press die 13 in the main process from the outer surface side to the inner surface side. The punch of the press die 13 in the main process has a flat cross section and its tip portion 13a is formed in an arc shape. Then, the slit 12 is expanded by the tip portion 13a to form a rising portion 11 of the insertion hole 2, and a shearing cross section 14 orthogonal to the flat surface 16 of the header plate 1 is formed on the inner surface thereof. At this time, in particular, in the vicinity of the rigid portion 7 which is the connecting portion between the first ridge portion 5 and the second ridge portion 6, due to the rigidity, as shown in FIGS. 1 (D) and 3 (B2), The shear surface 14 is formed as a smooth flat surface 8. That is, the planes of the opposing flat surfaces 8 are perpendicular to the plane of the header plate 1, and the surfaces are parallel and smooth.

さらに、図1(D)に示す如く、第2突条6(D−D)における立上げ高さH1は、第2突条部のない位置(E−E)の立上げ高さH2より高く設定することが好ましい。即ち、H1>H2である。しかも、その(D)内の平坦面8の長さH3は、第2突条部のない位置での平坦面8の長さH4より高く設定することが好ましい。即ち、H3>H4である。このように形成すると、第2突条部6における偏平チューブ3とヘッダプレート1とのろう付の接合部の長さは、突条のない位置でのそれらの長いので、ヘッダプレート1と偏平チューブ3との間で信頼性の高いろう付が実現できる。 Further, as shown in FIG. 1 (D), the rise height H1 in the second ridge 6 (DD) is higher than the rise height H2 in the position without the second ridge (EE). It is preferable to set it. That is, H1> H2. Moreover, it is preferable that the length H3 of the flat surface 8 in the (D) is set higher than the length H4 of the flat surface 8 at the position where there is no second ridge portion. That is, H3> H4. When formed in this way, the length of the brazed joint between the flat tube 3 and the header plate 1 in the second ridge 6 is long of them at the position where there is no ridge, so that the header plate 1 and the flat tube are formed. Highly reliable brazing can be realized with 3.

次いで、巻締接合部4を有する偏平チューブ3の長手方向の端部が立上げ部11内に挿通される。そして、図示しない高温の炉内で偏平チューブ3とヘッダプレート1とが一体的にろう付固定される。この時、図5に示す如く、偏平チューブ3の巻締接合部4の継目15の近傍は、ヘッダプレート1の剛性部7の存在により、その平坦面8が滑らかに形成されている。そのため、ヘッダプレート1の平坦面8と偏平チューブ3の外面に生じる巻締接合部4の継目15との間の隙間はろう材が流れない程度の小さなものになるので、そのろう付部は正確に形成される。 Next, the longitudinal end of the flat tube 3 having the winding joint 4 is inserted into the riser 11. Then, the flat tube 3 and the header plate 1 are integrally brazed and fixed in a high temperature furnace (not shown). At this time, as shown in FIG. 5, a flat surface 8 is smoothly formed in the vicinity of the seam 15 of the winding joint portion 4 of the flat tube 3 due to the presence of the rigid portion 7 of the header plate 1. Therefore, the gap between the flat surface 8 of the header plate 1 and the seam 15 of the winding joint 4 formed on the outer surface of the flat tube 3 is small enough to prevent the brazing material from flowing, so that the brazed portion is accurate. Is formed in.

次に、図6は、本発明の第2実施形態であり、偏平チューブ3として、その横断面の長軸の中央に偏平チューブ3の内部に仕切壁を形成するための中間接合部9が形成されたものを対象とする。
この例では、ヘッダプレート1の第1突条部5の長手方向の中央部に一対の第2突条部6が突設されている。そして、その第1突条部5と第2突条部6との境に剛性部7が形成され、その剛性部7に隣接して立上げ部11の内面に平坦面8が形成されており、その平坦面8の中間接合部9の継目15が配置されている。
立上げ部11の長手方向の中央部における平坦面8の内面は滑らかに形成されているため、偏平チューブ3の外面に生じる中間接合部9の継目15とのろう付を正確に行うことができる。即ち、高温の炉内でろう付中に、ろう材が中間接合部9の継目15の近傍から流れ出すことを平坦面8によって阻止している。
この第2実施形態のヘッダプレート1は、第1実施形態の前行程及び穿孔工程(第2工程)に準じて製造される。
この中間接合部9の形成位置は、偏平チューブの長手方向の中央位置に限られず、偏平チューブ3の長手方向の中間位置にあればよく、複数の位置に設けることもできる。その場合は、剛性部7を中間接合部9の数と位置に整合するように設ければよい。
Next, FIG. 6 shows a second embodiment of the present invention, in which an intermediate joint portion 9 for forming a partition wall inside the flat tube 3 is formed as the flat tube 3 at the center of the long axis of the cross section thereof. Targets what has been done.
In this example, a pair of second ridges 6 are projected from the central portion of the header plate 1 in the longitudinal direction of the first ridge 5. A rigid portion 7 is formed at the boundary between the first ridge portion 5 and the second ridge portion 6, and a flat surface 8 is formed on the inner surface of the rising portion 11 adjacent to the rigid portion 7. , The joint 15 of the intermediate joint portion 9 of the flat surface 8 is arranged.
Since the inner surface of the flat surface 8 at the central portion of the rising portion 11 in the longitudinal direction is smoothly formed, brazing of the intermediate joint portion 9 generated on the outer surface of the flat tube 3 with the seam 15 can be performed accurately. .. That is, the flat surface 8 prevents the brazing material from flowing out from the vicinity of the seam 15 of the intermediate joint portion 9 during brazing in the high temperature furnace.
The header plate 1 of the second embodiment is manufactured according to the previous step and the drilling step (second step) of the first embodiment.
The forming position of the intermediate joint portion 9 is not limited to the central position in the longitudinal direction of the flat tube, but may be an intermediate position in the longitudinal direction of the flat tube 3, and may be provided at a plurality of positions. In that case, the rigid portions 7 may be provided so as to match the number and position of the intermediate joint portions 9.

なお、この例では、ヘッダプレート1として、立上げ部11の長手方向の両端部に第2突条部6を設けるとともに、中央部にも第2突条部6を設けているが、長手方向の両端部における一対の第2突条部6を省略することもできる。
また、このように、長手方向に互いに離間して3つずつの第2突条部6を形成した場合には、中間接合部9を設けた偏平チューブ3に用いることができるとともに、図5に示す横断面の両端部に巻締接合部4を設けたものにも適用できる。第2突条部6の数は4つ以上とすることもできる。
In this example, as the header plate 1, the second ridges 6 are provided at both ends of the rising portion 11 in the longitudinal direction, and the second ridges 6 are also provided at the central portion in the longitudinal direction. It is also possible to omit the pair of second ridges 6 at both ends of the.
Further, when three second ridges 6 are formed so as to be separated from each other in the longitudinal direction in this way, the second ridges 6 can be used for the flat tube 3 provided with the intermediate joint 9, and FIG. It can also be applied to those provided with winding joints 4 at both ends of the cross section shown. The number of the second ridges 6 may be four or more.

(ヘッダプレートの立上げ工程の変形例)
図3における実施例では、ヘッダプレート1の穿孔に対して補助工程のプレス金型10と主工程のプレス金型13の2つのプレス金型を用いたが、実験によれば、補助工程のプレス金型10を用いず直接主工程のプレス金型13のみをヘッダプレート1の第1突条部5及び第2突条部6に適用しても、剛性部7の存在により、略同様の立上げ部11及び平坦面8を形成することができた。
したがって、図3(A1)及び図3(A2)におけるスリット12の形成工程は任意であり、省くこともできる。
なお、本願の熱交換器は、請求項に記載されている構成を有していれば発明の効果を奏することができ、それ以外の構成要素については、図面及び発明を実施するための形態の説明に記載された内容に限定されるものではない。
(Modification example of header plate start-up process)
In the embodiment shown in FIG. 3, two press dies, a press die 10 in the auxiliary process and a press die 13 in the main process, were used for drilling the header plate 1, but according to an experiment, the press in the auxiliary process was used. Even if only the press die 13 of the main process is directly applied to the first ridge portion 5 and the second ridge portion 6 of the header plate 1 without using the mold 10, the presence of the rigid portion 7 causes substantially the same standing. The raised portion 11 and the flat surface 8 could be formed.
Therefore, the steps of forming the slit 12 in FIGS. 3 (A1) and 3 (A2) are optional and can be omitted.
The heat exchanger of the present application can exert the effect of the invention as long as it has the configuration described in the claims, and the other components are shown in the drawings and in the form for carrying out the invention. It is not limited to the contents described in the description.

1 ヘッダプレート
2 挿通孔
3 偏平チューブ
4 巻締接合部
5 第1突条部
6 第2突条部
7 剛性部
8 平坦面
9 中間接合部
10 補助工程のプレス金型
10a 先端部
11 立上げ部
12 スリット
13 主工程のプレス金型
14 剪断面
15 継目
22 挿通孔
23 立上げ部
28 波打面
1 Header plate 2 Insertion hole 3 Flat tube 4 Winding joint 5 1st ridge 6 2nd ridge 7 Rigid part 8 Flat surface 9 Intermediate joint 10 Press die 10a Tip part 11 Rising part of auxiliary process 12 Slit 13 Main process press die 14 Shear cross section 15 Seam 22 Insertion hole 23 Rising part 28 Wavy surface

Claims (6)

ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されると共に、その偏平チューブ(3)はその横断面の長軸方向の端部に巻締接合部(4)を有するものであって、
ヘッダプレート(1)に、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の両端部に隣接した両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、を一対ずつ形成して、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)を形成する前工程と、
次いで、その第1突条部(5)の中心線上で、その外面側から内面側に穿孔して、偏平チューブ(3)の外周に整合する立上げリブ(11)を形成すると共に、前記剛性部(7)に隣接する立上げリブ(11)の内面をヘッダプレート(1)の平面に直交する平坦面(8)に形成する穿孔工程と、
前記巻締接合部(4)を前記剛性部(7)における平坦面(8)に位置して、偏平チューブ(3)と挿通孔(2)との間をろう付するろう付工程と、
を具備することを特徴とする熱交換器の製造方法。
The end of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the end of the flat tube (3) are brazed. While being fixed, the flat tube (3) has a brazing joint (4) at the end in the longitudinal direction of its cross section.
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The second ridge portion whose cross section is curved inwardly perpendicular to the first ridge portion (5) so that the end portion enters the first ridge portion (5) on both sides adjacent to both ends of the (6) and the previous step of forming a pair of each, and forming a rigid portion (7) at the connecting portion between the first ridge portion (5) and the second ridge portion (6).
Next, on the center line of the first ridge portion (5), a hole is formed from the outer surface side to the inner surface side thereof to form a rising rib (11) consistent with the outer circumference of the flat tube (3), and the rigidity is described. A drilling step of forming the inner surface of the rising rib (11) adjacent to the portion (7) on a flat surface (8) orthogonal to the plane of the header plate (1).
A brazing step in which the winding joint portion (4) is located on a flat surface (8) in the rigid portion (7) and is brazed between the flat tube (3) and the insertion hole (2).
A method for manufacturing a heat exchanger, which comprises the above.
ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されると共に、その偏平チューブ(3)はその横断面の長軸方向の中間位置に中間接合部(9)を有するものであって、
ヘッダプレート(1)に、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の中間に隣接した両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、を一対ずつ形成して、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)を形成する前工程と、
次いで、その第1突条部(5)の中心線上で、その外面側から内面側に穿孔して、偏平チューブ(3)の外周に整合する立上げリブ(11)を形成すると共に、前記剛性部(7)に隣接した立上げリブ(11)の内面をヘッダプレート(1)の平面に直交する平坦面(8)に形成する穿孔工程と、
前記中間接合部(9)を前記平坦面(8)に位置して、偏平チューブ(3)と挿通孔(2)との間をろう付するろう付工程と、
を具備することを特徴とする熱交換器の製造方法。
The end of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the end of the flat tube (3) are brazed. While being fixed, the flat tube (3) has an intermediate joint (9) at an intermediate position in the longitudinal direction of the cross section thereof.
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The second ridge (5) whose cross section is curved inwardly perpendicular to the first ridge (5) so that the end enters the first ridge (5) on both sides adjacent to the middle of the 6) and the previous step of forming a pair of each and forming a rigid portion (7) at the connecting portion between the first ridge portion (5) and the second ridge portion (6).
Next, on the center line of the first ridge portion (5), a hole is formed from the outer surface side to the inner surface side thereof to form a rising rib (11) consistent with the outer circumference of the flat tube (3), and the rigidity is described. A drilling step of forming the inner surface of the rising rib (11) adjacent to the portion (7) on a flat surface (8) orthogonal to the plane of the header plate (1).
A brazing step in which the intermediate joint (9) is located on the flat surface (8) and brazed between the flat tube (3) and the insertion hole (2).
A method for manufacturing a heat exchanger, which comprises the above.
前記穿孔に伴い第1突条部(5)の両端部および剛性部(7)の位置に、他の部分に比べて孔縁部をより高く且つ、前記平坦面(8)の高さを他の部分よりも高く形成した請求項1または請求項2に記載の熱交換器の製造方法。 Along with the perforation, the hole edge portion is made higher than the other portions and the height of the flat surface (8) is set at the positions of both ends of the first ridge portion (5) and the rigid portion (7). The method for manufacturing a heat exchanger according to claim 1 or 2, wherein the heat exchanger is formed higher than the portion of the above. 前記前工程と穿孔工程との中間に、偏平チューブの幅に比べて狭い幅のスリット(12)を形成する工程を設けたことを特徴とする請求項1または請求項2に記載の熱交換器の製造方法。 The heat exchanger according to claim 1 or 2, wherein a step of forming a slit (12) having a width narrower than the width of the flat tube is provided between the previous step and the drilling step. Manufacturing method. ヘッダプレートは、第1突条部(5)の長手方向の中間と両端とに隣接した両側の位置で、予めその内面側に湾曲する3本以上の第2突条部(6)および剛性部(7)をそれぞれ形成しておく前工程を有する請求項1乃至請求項4のいずれかに記載の熱交換器の製造方法。 The header plate has three or more second ridges (6) and a rigid portion that are curved in advance toward the inner surface of the first ridge (5) at positions on both sides adjacent to the middle and both ends in the longitudinal direction. The method for manufacturing a heat exchanger according to any one of claims 1 to 4, further comprising a pre-process for forming (7). ヘッダプレート(1)に設けた偏平な挿通孔(2)に、偏平チューブ(3)の端部が挿通され、その挿通孔(2)と偏平チューブ(3)の端部との間がろう付固定されていると共に、その偏平チューブ(3)はその横断面の長軸方向の端部に巻締接合部(4)又はその横断面の長軸方向の中間位置に中間接合部(9)を有するものであって、
ヘッダプレート(1)は、前記挿通孔(2)の位置を取り囲むように横断面が内面側に湾曲する細長い第1突条部(5)と、その第1突条部(5)の長手方向の両端部又は長手方向の中間に隣接する両側に、端部が第1突条部(5)内に入り込むように第1突条部(5)に直交して内面側に横断面が湾曲する第2突条部(6)と、が一対ずつ形成されており、その第1突条部(5)と第2突条部(6)との接続部に剛性部(7)が形成されており、
前記第1突条部(5)の中心線上には、偏平チューブ(3)の外周に整合する立上げリブ(11)を有する挿通孔(2)が穿孔されていると共に、前記剛性部(7)に隣接した立上げリブ(11)の内面にヘッダプレート(1)の平面に直交する平坦面(8)が形成されている構造を有しており、
前記偏平チューブ(3)の巻締接合部(4)又は中間接合部(9)が前記剛性部(7)における平坦面(8)に位置した状態で、偏平チューブ(3)とヘッダプレート(1)の挿通孔(2)との間がろう付固定されていることを特徴とする熱交換器。
The end of the flat tube (3) is inserted into the flat insertion hole (2) provided in the header plate (1), and the insertion hole (2) and the end of the flat tube (3) are brazed. While being fixed, the flat tube (3) has a brazing joint (4) at the end in the long axis direction of its cross section or an intermediate joint (9) at an intermediate position in the long axis direction of its cross section. Have
The header plate (1) has an elongated first ridge portion (5) whose cross section is curved inward so as to surround the position of the insertion hole (2), and the longitudinal direction of the first ridge portion (5). The cross section is curved toward the inner surface side orthogonal to the first ridge portion (5) so that the end portion enters the first ridge portion (5) on both ends or both sides adjacent to the middle in the longitudinal direction. A pair of the second ridge portion (6) is formed, and a rigid portion (7) is formed at the connecting portion between the first ridge portion (5) and the second ridge portion (6). Orthogonal
An insertion hole (2) having a rising rib (11) aligned with the outer circumference of the flat tube (3) is formed on the center line of the first ridge portion (5), and the rigid portion (7) is formed. ), A flat surface (8) orthogonal to the plane of the header plate (1) is formed on the inner surface of the rising rib (11).
The flat tube (3) and the header plate (1) are in a state where the brazing joint (4) or the intermediate joint (9) of the flat tube (3) is located on the flat surface (8) of the rigid portion (7). ) Is fixed with brazing between the insertion hole (2) and the heat exchanger (2).
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