JP2828480B2 - Method of manufacturing header pipe for heat exchanger - Google Patents
Method of manufacturing header pipe for heat exchangerInfo
- Publication number
- JP2828480B2 JP2828480B2 JP2035634A JP3563490A JP2828480B2 JP 2828480 B2 JP2828480 B2 JP 2828480B2 JP 2035634 A JP2035634 A JP 2035634A JP 3563490 A JP3563490 A JP 3563490A JP 2828480 B2 JP2828480 B2 JP 2828480B2
- Authority
- JP
- Japan
- Prior art keywords
- header pipe
- pipe material
- connection hole
- bending
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000000463 material Substances 0.000 claims description 45
- 238000005452 bending Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 19
- 238000004080 punching Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0243—Header boxes having a circular cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は熱交換器、例えば各種冷房装置の凝縮器や車
両用ラジエータ等の構成部品であるヘッダーパイプの製
造方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a heat exchanger, for example, a header pipe which is a component of a condenser for various cooling devices, a radiator for a vehicle, or the like.
（従来の技術） 従来、この種の熱交換器用のヘッダーパイプの製造方
法として特開昭61−235698号に係る製造方法が知られて
いる。(Prior Art) Conventionally, as a method for manufacturing a header pipe for this type of heat exchanger, a manufacturing method according to Japanese Patent Application Laid-Open No. 61-235698 is known.
この製造方法はまず平板状のヘッダーパイプ素材を円
筒状に曲げ加工し、次いで、この円筒状のヘッダーパイ
プ素材の開口端部をろう付けする。このようにヘッダー
パイプ素材を筒体とした後に、ヘッダーパイプ素材の側
面に熱交換チューブを接続する接続孔をポンチにより孔
開け加工する。In this manufacturing method, first, a plate-shaped header pipe material is bent into a cylindrical shape, and then the open end of the cylindrical header pipe material is brazed. After the header pipe material is formed into a cylindrical body in this way, a connection hole for connecting a heat exchange tube to a side surface of the header pipe material is punched by a punch.
しかしながら、このようなヘッダーパイプの製造方法
では、筒体のヘッダーパイプ素材を孔開け加工する際
に、ポンチによる加圧力が孔開け部分以外にも加わるた
め、製造されたヘッダーパイプに変形が生ずるおそれが
あった。また、このようにヘッダーパイプに変形が生じ
ているときは、これを矯正することを要し、矯正工程が
付加され製造工程が増加するという問題点を有してい
た。However, in such a method for manufacturing a header pipe, when the header pipe material of the cylindrical body is drilled, the pressing force by the punch is applied to the portion other than the hole, so that the manufactured header pipe may be deformed. was there. In addition, when the header pipe is deformed as described above, it is necessary to correct the deformation, and there is a problem that a correction process is added and a manufacturing process is increased.
このような問題点を解決するため、次に述べるヘッダ
ーパイプの製造方法を提案することができる。即ち、平
板状のヘッダーパイプ素材に熱交換チューブ用の接続孔
をポンチにより予め孔開け加工し、その後にこのヘッダ
ーパイプ素材を曲げ円筒状に形成するものである。In order to solve such a problem, a method for manufacturing a header pipe described below can be proposed. That is, a connection hole for a heat exchange tube is previously formed in a flat header pipe material by a punch, and then the header pipe material is formed into a bent cylindrical shape.
この製造方法によれば、ポンチによる孔開け加工によ
って生ずる変形は、その後の曲げ加工時に矯正されるた
め、ヘッダーパイプの変形が防止される。According to this manufacturing method, the deformation caused by the punching process by the punch is corrected during the subsequent bending process, so that the deformation of the header pipe is prevented.
（発明が解決しようとする課題） この後者のヘッダーパイプの製造方法において、ヘッ
ダーパイプの曲面に形成された接続孔には熱交換チュー
ブが挿入されるため、平板状のヘッダーパイプ素材に形
成される接続孔の大きさ、形状はヘッダーパイプ素材を
曲げたときに形成される接続孔の大きさ、形状を予め想
定して孔開け加工しなければならず、孔開け加工の際に
高精度の加工が要求されるという問題点を有していた。(Problems to be Solved by the Invention) In the latter method of manufacturing a header pipe, since a heat exchange tube is inserted into a connection hole formed in a curved surface of the header pipe, the header pipe is formed into a flat header pipe material. The size and shape of the connection hole must be pre-formed by assuming the size and shape of the connection hole formed when the header pipe material is bent. Is required.
また、接続孔の孔開け加工を高精度に行ったとして
も、これに続く曲げ加工時に接続孔に歪みが生ずること
があり、所望の接続孔を製造することができないという
問題点を有していた。Further, even if the connection holes are drilled with high precision, the connection holes may be distorted during the subsequent bending, so that a desired connection hole cannot be manufactured. Was.
本発明の目的は前記従来の問題点に鑑み、ヘッダーパ
イプの変形を防止するとともに、接続孔を所望の大き
さ、形状等に形成することができる熱交換器用ヘッダー
パイプの製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing a header pipe for a heat exchanger, which can prevent deformation of a header pipe and form a connection hole in a desired size, shape, and the like, in view of the conventional problems. It is in.
（課題を解決するための手段） 本発明は前記課題を解決するため、平板状のヘッダー
パイプ素材を筒状に曲げるとともに、該ヘッダーパイプ
素材の側壁に熱交換チューブの接続孔を形成する熱交換
器用ヘッダーパイプの製造方法において、平板状のヘッ
ダーパイプ素材をその長手方向に沿って全体を断面略Ｕ
字状に曲げる第１曲げ工程と、該第１曲げ工程の後に該
ヘッダーパイプ素材の曲面部に前記接続孔を形成する孔
開け工程と、該孔開け工程の後に該ヘッダーパイプ素材
の開口部側を内側に曲げ開口端部を当接させる第２曲げ
工程とを有することを特徴とする。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a heat exchange method in which a flat header pipe material is bent into a tubular shape and a connection hole of a heat exchange tube is formed in a side wall of the header pipe material. In the method for manufacturing a container header pipe, a flat plate-shaped header pipe material is entirely cut in a substantially U-shaped section along its longitudinal direction.
A first bending step of bending into a character shape, a hole forming step of forming the connection hole in a curved surface portion of the header pipe material after the first bending step, and an opening side of the header pipe material after the hole forming step And a second bending step of bending the opening inward to abut the opening end.
（作 用） 本発明によれば、第１曲げ工程により接続孔が形成さ
れる曲面部が予め形成され、その後に続く孔開け工程に
よりこの曲面部に接続孔が形成される。このように、ヘ
ッダーパイプ素材の曲面部に直接に接続孔が形成される
から、孔開け工具即ちポンチ等の形状、大きさは熱交換
チューブの接続端に合せて設定すれば良く、所望の接続
孔を形成することができる。(Operation) According to the present invention, a curved surface portion in which a connection hole is formed in the first bending step is formed in advance, and a connection hole is formed in this curved surface portion in a subsequent drilling step. As described above, since the connection hole is formed directly on the curved surface portion of the header pipe material, the shape and size of the punching tool, that is, the punch, may be set according to the connection end of the heat exchange tube, and the desired connection may be made. Holes can be formed.
この孔開け工程で、ヘッダーパイプ素材の開口部側に
変形が生ずる場合があるが、この孔開け工程に続く第２
曲げ工程で開口部側が曲げられ、変形部分がこの曲げ工
程で矯正される。また、第２曲げ工程は開口部側を曲げ
るだけで、接続孔側を曲げるものではないから、接続孔
に歪みが生ずることがない。In the hole making step, deformation may occur on the opening side of the header pipe material.
The opening side is bent in the bending step, and the deformed portion is corrected in this bending step. Further, since the second bending step only bends the opening side and does not bend the connection hole side, no distortion occurs in the connection hole.
（実施例） 第１図乃至第８図は本発明の一実施例を示すもので、
第１図はヘッダーパイプを構成部品とする熱交換器の斜
視図である。(Embodiment) FIGS. 1 to 8 show one embodiment of the present invention.
FIG. 1 is a perspective view of a heat exchanger including a header pipe as a component.
図中、１は車両用のラジエータ等として使用される熱
交換器、２は上下に延び対向する一対のヘッダーパイプ
である。この各ヘッダーパイプ２には複数段に熱交換チ
ューブ３が接続し、この熱交換チューブ３間には伝熱フ
ィン４が介装されている。In the figure, reference numeral 1 denotes a heat exchanger used as a radiator or the like for a vehicle, and 2 denotes a pair of header pipes extending vertically and facing each other. Heat exchange tubes 3 are connected to each header pipe 2 in a plurality of stages, and heat transfer fins 4 are interposed between the heat exchange tubes 3.
第２図はこのヘッダーパイプ２と熱交換チューブ３と
の接続状態を示すものである。この各ヘッダーパイプ２
の対向面には上下に複数の接続孔５が設けられ、この接
続孔５の周縁には内側に折曲されたテーパ部６が形成さ
れている。各テーパ部６の周辺は外側に湾曲することな
く平坦に形成されている。また、各接続孔５には熱交換
チューブ３の端が挿入され、テーパ部６と熱交換チュー
ブ３との間はろう材７にてろう付けされている。FIG. 2 shows a connection state between the header pipe 2 and the heat exchange tube 3. Each header pipe 2
A plurality of connection holes 5 are provided on the upper surface and the lower surface, and a tapered portion 6 which is bent inward is formed on the periphery of the connection hole 5. The periphery of each tapered portion 6 is formed flat without curving outward. The end of the heat exchange tube 3 is inserted into each connection hole 5, and the space between the tapered portion 6 and the heat exchange tube 3 is brazed with a brazing material 7.
このような熱交換器１は一方のヘッダーパイプ２の熱
媒体流入パイプ８から他方のヘッダーパイプ２の熱媒体
流出パイプ９へ熱媒体を流すもので、この熱媒体と伝熱
フィン４間に流れる空気との間で熱交換を行なう空気熱
交換器を構成している。Such a heat exchanger 1 flows a heat medium from a heat medium inflow pipe 8 of one header pipe 2 to a heat medium outflow pipe 9 of the other header pipe 2, and flows between the heat medium and the heat transfer fins 4. An air heat exchanger that exchanges heat with air is configured.
第３図（ａ）（ｂ）乃至第８図は前述のヘッダーパイ
プ２の製造方法を示している。ここで、第３図（ａ）
（ｂ）は製造方法の第１曲げ工程を示している。即ち、
ヘッダーパイプ２の上下の長さ寸法及び周側壁の周寸法
を有する平板でろう材がクラッドされたヘッダーパイプ
素材10を用意する。このヘッダーパイプ素材10を第３図
（ａ）に示すように半円形状の溝11を有するプレス機12
のダイ13上に置き、これを下端が半円形状の曲げ用ポン
チ14により第３図（ｂ）に示すように押圧する。これに
より、第４図に示すような曲面部15を有する断面Ｕ字状
のヘッダーパイプ素材10が形成される。FIGS. 3 (a), (b) to 8 show a method of manufacturing the above-described header pipe 2. FIG. Here, FIG. 3 (a)
(B) shows a first bending step of the manufacturing method. That is,
A header pipe material 10 is prepared in which a brazing material is clad with a flat plate having a vertical dimension of the header pipe 2 and a peripheral dimension of a peripheral side wall. As shown in FIG. 3 (a), this header pipe blank 10 is pressed into a press machine 12 having a semi-circular groove 11.
The die 13 is pressed by a bending punch 14 having a semicircular lower end as shown in FIG. 3 (b). Thus, a header pipe material 10 having a U-shaped cross section having a curved surface portion 15 as shown in FIG. 4 is formed.
このヘッダーパイプ素材10の第１曲げ工程が終了した
ときは、第５図（ａ）（ｂ）に示す孔開け工程に移行す
る。即ち、第５図（ａ）に示すように、Ｕ字状のヘッダ
ーパイプ素材10をこのヘッダーパイプ素材10の内面に対
応するよう形成されたプレス機16のダイ17に載置すると
ともに、ヘッダーパイプ素材10の外面をポンチガイド18
により保持する。また、ポンチホルダ19には孔開け用ポ
ンチ20が固定されている。この孔開け用ポンチ20の下端
にはヘッダーパイプ素材10の曲面部15の幅方向に切削す
る切削部21を有し、この切削部21の上方には下方に向っ
て幅が徐々に小さくなるよう傾斜した折曲げ部22を有し
ている。他方、ダイ17にはポンチ挿入用の溝23が設けら
れ、この溝23はヘッダーパイプ素材10の曲面部15を間に
して切削部21及び折曲げ部22と略相似形をなしている。When the first bending process of the header pipe blank 10 is completed, the process proceeds to a hole forming process shown in FIGS. 5 (a) and 5 (b). That is, as shown in FIG. 5 (a), the U-shaped header pipe material 10 is placed on a die 17 of a press 16 formed so as to correspond to the inner surface of the header pipe material 10, and the header pipe material is removed. Punch guide 18 on outer surface of material 10
Hold by. A punch 20 for punching is fixed to the punch holder 19. At the lower end of the punch 20 for punching, there is a cutting portion 21 for cutting in the width direction of the curved surface portion 15 of the header pipe material 10, and the width of the cutting portion 21 is gradually reduced downward in the upward direction. It has an inclined bent portion 22. On the other hand, the die 17 is provided with a groove 23 for punch insertion, and the groove 23 has a substantially similar shape to the cutting portion 21 and the bent portion 22 with the curved surface portion 15 of the header pipe blank 10 therebetween.
ここで、第５図（ｂ）に示すように、上部ダイセット
24を下方に移動させるときは、孔開け用ポンチ20がポン
チガイド18に沿って下降し、孔開け用ポンチ20の切削部
21及び折曲げ部22がダイ17の溝23に挿入される。このと
き、この切削部21により接続孔５が設けられ、また、折
曲げ部22によりテーパ部６が形成される。従って、第６
図に示すように、曲面部15に接続孔５及びテーパ部６を
有する断面Ｕ字状のヘッダーパイプ素材10が製造され
る。Here, as shown in FIG. 5 (b), the upper die set
When moving the punch 24 downward, the punch 20 for punching moves down along the punch guide 18 and the cutting portion of the punch 20 for punching is
21 and bent portion 22 are inserted into groove 23 of die 17. At this time, the connection hole 5 is provided by the cut portion 21, and the tapered portion 6 is formed by the bent portion 22. Therefore, the sixth
As shown in the figure, a header pipe material 10 having a U-shaped cross section having a connection hole 5 and a tapered portion 6 in a curved surface portion 15 is manufactured.
このような孔開け工程が終了したときは、第７図
（ａ）（ｂ）に示す第２曲げ工程に移行する。この第２
曲げ工程においては、第７図（ａ）（ｂ）に示すプレス
機25を使用する。即ち、上型26の下面中央にヘッダーパ
イプ２の外面に対応する溝27を形成するとともに、下面
両周縁に斜め下方に延びる傾斜部28を形成している。他
方、この上型26に対向して一対の可動ダイ29を有し、各
可動ダイ29の対向する側の上面にはヘッダーパイプ２の
外面に対応する切欠き部30を有し、また、上面の外側周
縁には上型26の傾斜部28に対応して傾斜した案内部31を
有している。When such a perforation process is completed, the process proceeds to a second bending process shown in FIGS. 7 (a) and 7 (b). This second
In the bending step, a press machine 25 shown in FIGS. 7A and 7B is used. That is, a groove 27 corresponding to the outer surface of the header pipe 2 is formed at the center of the lower surface of the upper die 26, and an inclined portion 28 that extends obliquely downward is formed at both peripheral edges of the lower surface. On the other hand, the movable die 29 has a pair of movable dies 29 opposed to the upper die 26, and has a cutout 30 corresponding to the outer surface of the header pipe 2 on the upper surface on the opposite side of each movable die 29. The outer peripheral edge of the upper mold 26 has a guide portion 31 inclined corresponding to the inclined portion 28 of the upper die 26.
このプレス機25により曲げ加工を行うときは、まず、
孔開け工程を終了したヘッダーパイプ素材10の曲面部15
を第７図（ａ）に示すように各ダイ29の切欠き部30上に
載置し、ヘッダーパイプ素材10の開口部32を上方に向け
る。その後、上型26を上部ダイセット33により下降させ
る。When performing bending by this press machine 25, first,
Curved surface 15 of header pipe material 10 after drilling process
Is placed on the notch 30 of each die 29 as shown in FIG. 7 (a), and the opening 32 of the header pipe material 10 is turned upward. Thereafter, the upper die 26 is lowered by the upper die set 33.
この上型26の下降（実線白抜き矢印）途中で、第７図
（ｃ）に示すように、上型26の傾斜部28が各可動ダイ29
の案内部31に接し、この案内部31を押圧する。この押圧
力により可動ダイ29に横方向への移動力が生じ、各可動
ダイ29が相互に対向する側に移動し（一点鎖線白抜き矢
印）、ヘッダーパイプ素材10の曲面部15を保持する。他
方、第７図（ｂ）に示すように、上型26はその溝27によ
りヘッダーパイプ素材10の開口部32側を半円形状に曲
げ、開口端部34を当接させる。これにより、第８図に示
すように、接続孔５及びテーパ部６を有し、かつ、円筒
状のヘッダーパイプ素材10が形成される。As shown in FIG. 7 (c), during the downward movement of the upper die 26 (solid arrow), the movable die 29
And presses the guide portion 31. The pressing force generates a lateral moving force on the movable dies 29, and the movable dies 29 move to the sides facing each other (dotted-line white arrows) to hold the curved surface portion 15 of the header pipe material 10. On the other hand, as shown in FIG. 7 (b), the upper mold 26 bends the opening 32 side of the header pipe material 10 into a semicircular shape by the groove 27, and makes the opening end 34 abut. As a result, as shown in FIG. 8, a cylindrical header pipe material 10 having the connection holes 5 and the tapered portions 6 is formed.
この第２曲げ工程が終了したときは、ヘッダーパイプ
素材10の上下にそれぞれ蓋35を取付けるとともに、各パ
イプ8,9を連結し、これを加熱炉に入れ一括ろう付けす
ることによりヘッダーパイプ２が製造される。尚、この
一括ろう付けは、各ヘッダーパイプ２の各接続孔５に各
熱交換チューブ３を挿入接続し、更に伝熱フィン４を各
熱交換チューブ３間に介装した後に行なうようにしても
良い。When the second bending step is completed, the lids 35 are attached to the upper and lower portions of the header pipe material 10, respectively, and the respective pipes 8, 9 are connected. Manufactured. This batch brazing may be performed after inserting each heat exchange tube 3 into each connection hole 5 of each header pipe 2 and further interposing heat transfer fins 4 between each heat exchange tube 3. good.
以上のように、本実施例に係るヘッダーパイプ２の製
造方法において、第１曲げ工程により曲面部15が形成さ
れ、その後に続く孔開け工程により曲面部15に接続孔５
が形成されるから、ヘッダーパイプ素材10の曲面部15に
直接に接続孔５が形成される。従って、孔開け用ポンチ
20の切削部21及び折曲げ部22の形状、大きさは熱交換チ
ューブ３の接続端に合せて設定すれば良く、寸法取りを
容易に行なうことができる。As described above, in the method of manufacturing the header pipe 2 according to the present embodiment, the curved surface portion 15 is formed by the first bending process, and the connection hole 5 is formed in the curved surface portion 15 by the subsequent boring process.
Is formed, the connection hole 5 is formed directly in the curved surface portion 15 of the header pipe material 10. Therefore, punch for punching
The shape and size of the cut portion 21 and the bent portion 22 may be set in accordance with the connection end of the heat exchange tube 3, so that the dimensions can be easily obtained.
また、この孔開け工程で、ヘッダーパイプ素材10の開
口部32側に変形を生ずるおそれがあるが、この孔開け工
程に続く第２曲げ工程でこの開口部32側が曲げられ、こ
の変形部分がこの第２曲げ工程で矯正される。Further, in the hole making step, there is a possibility that the opening 32 side of the header pipe material 10 may be deformed. However, in the second bending step following the hole making step, the opening 32 side is bent, and this deformed portion is It is corrected in the second bending step.
更に、この第２曲げ工程はヘッダーパイプ素材10の開
口部32側を曲げるだけで、既に形成された接続孔５側を
曲げるものではないから、接続孔５に歪みが生ずること
がない。Furthermore, since the second bending step only bends the opening 32 side of the header pipe blank 10 and does not bend the already formed connection hole 5 side, no distortion occurs in the connection hole 5.
更にまた、このような製造方法により製造されたヘッ
ダーパイプ２は、その接続孔５の周辺にテーパ部６が形
成されているから、熱交換チューブ３の接続の際にこの
テーパ部６が熱交換チューブ３の接続端の案内面とな
り、熱交換チューブ３の挿入接続が容易になる。更にま
た、このテーパ部６の周辺は孔開け工程時にポンチガイ
ド18により保持され、湾曲変形を防止しているため、伝
熱フィン４とヘッダーパイプ２との間に大きな溝が形成
されることがない。これにより、ヘッダーパイプ２側を
通過する空気が効率良く伝熱フィン４と熱交換すること
となる。Furthermore, in the header pipe 2 manufactured by such a manufacturing method, the tapered portion 6 is formed around the connection hole 5. It serves as a guide surface for the connection end of the tube 3 and facilitates insertion and connection of the heat exchange tube 3. Furthermore, the periphery of the tapered portion 6 is held by the punch guide 18 during the hole making step to prevent bending deformation, so that a large groove is formed between the heat transfer fin 4 and the header pipe 2. Absent. As a result, the air passing through the header pipe 2 efficiently exchanges heat with the heat transfer fins 4.
尚、前記実施例では熱交換チューブ３とヘッダーパイ
プ２との接続作業を考慮し、テーパ部６を有するヘッダ
ーパイプ２の製造方法について説明したが、テーパ部６
を持たないヘッダーパイプ、即ち接続孔がヘッダーパイ
プ２の側壁と面一となっているヘッダーパイプ２につい
ても前述の各工程が適用できることは勿論である。In the above-described embodiment, the method of manufacturing the header pipe 2 having the tapered portion 6 has been described in consideration of the connection work between the heat exchange tube 3 and the header pipe 2.
Needless to say, the above-described steps can also be applied to a header pipe having no hole, that is, a header pipe having a connection hole flush with a side wall of the header pipe 2.
（発明の効果） 以上説明したように、本発明によれば、第１曲げ工程
により接続孔が形成される曲面部が予め形成され、その
後に続く孔開け工程によりこの曲面部に接続孔が形成さ
れ、ヘッダーパイプ素材の曲面部に直接に接続孔５が形
成されるから、孔開け工具即ちポンチ等の形状、大きさ
は熱交換チューブの接続端に合せて設定すれば良く、孔
開け工具の寸法取りが容易にできる。(Effects of the Invention) As described above, according to the present invention, a curved surface portion in which a connection hole is formed in the first bending step is formed in advance, and a connection hole is formed in the curved surface portion in a subsequent hole forming step. Since the connection hole 5 is formed directly on the curved surface portion of the header pipe material, the shape and size of the punching tool, that is, the punch, may be set according to the connection end of the heat exchange tube. Easy dimensioning.
また、この孔開け工程で、ヘッダーパイプ素材の開口
部側に変形が生ずる場合があるが、この孔開け工程に続
く第２曲げ工程で開口部側が曲げられ、変形部分がこの
曲げ工程で矯正されるし、また、第２曲げ工程は開口部
側を曲げるだけで、接続孔側を曲げるものではないか
ら、接続孔に歪みが生ずることがない。従って、熱交換
チューブが接続される接続孔を精密に形成することがで
きる。Further, in the hole making step, deformation may occur on the opening side of the header pipe material. In the second bending step following the hole making step, the opening side is bent, and the deformed portion is corrected in this bending step. In addition, the second bending step only bends the opening side and does not bend the connection hole side, so that no distortion occurs in the connection hole. Therefore, the connection hole to which the heat exchange tube is connected can be precisely formed.
第１図乃至第８図は本発明の一実施例を示すもので、第
１図は熱交換器の全体斜視図、第２図はヘッダーパイプ
と熱交換チューブの接続状態を示す断面図、第３図
（ａ）（ｂ）は第１曲げ工程を示す正面図、第４図は第
１曲げ工程後のヘッダーパイプ素材を示す斜視図、第５
図（ａ）（ｂ）は孔開け工程を示す断面図、第６図は孔
開け工程後のヘッダーパイプ素材を示す斜視図、第７図
（ａ）（ｂ）は第２曲げ工程を示す正面図、第７図
（ｃ）は上型と可動ダイの移動状態を示す説明図、第８
図は第２曲げ工程後のヘッダーパイプ素材を示す斜視図
である。 図中、１……熱交換器、２……ヘッダーパイプ、３……
熱交換チューブ、５……接続孔、10……ヘッダーパイプ
素材、15……曲面部、32……開口部、34……開口端部。1 to 8 show an embodiment of the present invention. FIG. 1 is an overall perspective view of a heat exchanger, FIG. 2 is a sectional view showing a connection state of a header pipe and a heat exchange tube, 3 (a) and 3 (b) are front views showing a first bending step, FIG. 4 is a perspective view showing a header pipe material after the first bending step, and FIG.
6 (a) and 6 (b) are cross-sectional views showing a hole making step, FIG. 6 is a perspective view showing a header pipe material after the hole making step, and FIGS. 7 (a) and 7 (b) are front views showing a second bending step. FIG. 7 (c) is an explanatory view showing the moving state of the upper die and the movable die, and FIG.
The figure is a perspective view showing the header pipe material after the second bending step. In the figure, 1 ... heat exchanger, 2 ... header pipe, 3 ...
Heat exchange tube, 5: Connection hole, 10: Header pipe material, 15: Curved surface, 32: Opening, 34: Open end.
Claims (1)
るとともに、該ヘッダーパイプ素材の側壁に熱交換チュ
ーブの接続孔を形成する熱交換器用ヘッダーパイプの製
造方法において、 平板状のヘッダーパイプ素材をその長手方向に沿って全
体を断面略Ｕ字状に曲げる第１曲げ工程と、該第１曲げ
工程の後に該ヘッダーパイプ素材の曲面部に前記接続孔
を形成する孔開け工程と、該孔開け工程の後に該ヘッダ
ーパイプ素材の開口部側を内側に曲げ開口端部を当接さ
せる第２曲げ工程とを有する ことを特徴とする熱交換器用ヘッダーパイプの製造方
法。1. A method for manufacturing a header pipe for a heat exchanger, comprising bending a flat header pipe material into a tubular shape and forming a connection hole for a heat exchange tube in a side wall of the header pipe material. A first bending step of bending the whole into a substantially U-shaped cross section along the longitudinal direction thereof; a hole forming step of forming the connection hole in a curved surface portion of the header pipe material after the first bending step; A second bending step in which the opening side of the header pipe material is bent inward after the opening step, and the opening end is brought into contact with the header pipe material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2035634A JP2828480B2 (en) | 1990-02-16 | 1990-02-16 | Method of manufacturing header pipe for heat exchanger |
| US07/656,800 US5119552A (en) | 1990-02-16 | 1991-02-19 | Method for manufacturing header pipe of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2035634A JP2828480B2 (en) | 1990-02-16 | 1990-02-16 | Method of manufacturing header pipe for heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03238130A JPH03238130A (en) | 1991-10-23 |
| JP2828480B2 true JP2828480B2 (en) | 1998-11-25 |
Family
ID=12447308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2035634A Expired - Fee Related JP2828480B2 (en) | 1990-02-16 | 1990-02-16 | Method of manufacturing header pipe for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2828480B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947610A (en) * | 2010-08-03 | 2011-01-19 | 浙江广山汽车零部件有限公司 | Hydraulic oil radiator mainboard production process |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012241973A (en) * | 2011-05-19 | 2012-12-10 | Daikin Industries Ltd | Corrugated fin laminated heat exchanger with bridge, and method of manufacturing the same |
| CN106890886B (en) * | 2017-02-16 | 2019-06-25 | 惠州智科实业有限公司 | A kind of production method of heat-conducting base |
| CN111829363B (en) * | 2019-10-08 | 2022-07-22 | 浙江三花智能控制股份有限公司 | Heat exchanger |
| CN111829364A (en) * | 2019-10-08 | 2020-10-27 | 浙江三花智能控制股份有限公司 | Heat Exchanger |
| CN113513932B (en) * | 2021-04-26 | 2023-07-07 | 浙江银轮机械股份有限公司 | Heat exchanger and system thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0390236A (en) * | 1989-08-31 | 1991-04-16 | Showa Alum Corp | Manufacture of heat exchanger |
-
1990
- 1990-02-16 JP JP2035634A patent/JP2828480B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947610A (en) * | 2010-08-03 | 2011-01-19 | 浙江广山汽车零部件有限公司 | Hydraulic oil radiator mainboard production process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03238130A (en) | 1991-10-23 |
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