JPH10113731A - End part drawing method of flat perforated pipe - Google Patents
End part drawing method of flat perforated pipeInfo
- Publication number
- JPH10113731A JPH10113731A JP8270143A JP27014396A JPH10113731A JP H10113731 A JPH10113731 A JP H10113731A JP 8270143 A JP8270143 A JP 8270143A JP 27014396 A JP27014396 A JP 27014396A JP H10113731 A JPH10113731 A JP H10113731A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchange
- exchange medium
- medium passage
- flat
- width direction
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
- F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エアコン用熱交換
器等の熱交換用チューブなどとして用いられる偏平多孔
管の端部絞り加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing an end of a flat porous tube used as a heat exchange tube of a heat exchanger for an air conditioner or the like.
【０００２】[0002]
【従来の技術】カークーラー用凝縮器などに用いられる
熱交換器として、並列状態に配置された複数本の押出型
材製偏平多孔チューブの端部が、中空ヘッダーに連通状
態に接続された構造の、いわゆるマルチフロータイプと
称されるアルミニウム製熱交換器が好んで用いられてい
る。この熱交換器において、偏平チューブとヘッダーと
は、ヘッダーの周壁に周方向スリット状に形成されたチ
ューブ挿入孔を通じて、偏平チューブの端部をヘッダー
内に挿入嵌合し、その挿入嵌合状態で一括ろう付けする
ことにより接合一体化されている。2. Description of the Related Art As a heat exchanger used for a condenser for a car cooler or the like, a structure in which ends of a plurality of flat porous tubes made of an extruded die material arranged in parallel are connected to a hollow header in a communicating state. A so-called multi-flow type aluminum heat exchanger is preferably used. In this heat exchanger, the flat tube and the header are inserted and fitted into the header through the tube insertion hole formed in the peripheral wall of the header in a circumferential slit shape. They are joined and integrated by brazing all together.
【０００３】そして、ヘッダー内へのチューブ端部の挿
入に際し、ヘッダー内へのチューブの挿入長さが自動設
定されるようにすること、チューブ幅と高さの寸法を矯
正すること等を目的として、図６（イ）（ロ）に示され
るように、偏平チューブ（51）は、その長手方向の端部
が、少なくとも幅方向に縮小されるように絞り加工され
るとともに、該縮小端部（52）の基端段部（53）が、図
６（ハ）に示されるように、ヘッダー（54）のチューブ
挿入孔 （55）の周縁部に当接されるようになされてい
る。[0003] When inserting the tube end into the header, the length of insertion of the tube into the header is automatically set, and the dimensions of the tube width and height are corrected. As shown in FIGS. 6 (a) and 6 (b), the flat tube (51) is drawn so that its longitudinal end is reduced at least in the width direction, and the reduced end ( As shown in FIG. 6 (c), the base end step (53) of the 52) comes into contact with the peripheral edge of the tube insertion hole (55) of the header (54).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
絞り加工では、図６（ロ）に示されるように、偏平チュ
ーブ（51）の熱交換媒体通路孔（56）…、特に幅方向の
最外側に位置する熱交換媒体通路孔（56a ）（56a ）
が、潰れ等の変形によって不本意に狭くなってしまい、
そのため、熱交換中、その熱交換媒体通路孔（56a ）
（56a ）を通過する冷媒の流量を少なくして、熱交換性
能を悪くしたり、冷媒圧力損失を大きくしてしまうとい
う問題があった。However, in the conventional drawing, as shown in FIG. 6 (b), the heat exchange medium passage holes (56) of the flat tube (51), especially the outermost in the width direction. Heat exchange medium passage hole (56a) (56a) located at
However, it becomes narrow unintentionally due to deformation such as crushing,
Therefore, during heat exchange, the heat exchange medium passage hole (56a)
There is a problem that the flow rate of the refrigerant passing through (56a) is reduced to deteriorate the heat exchange performance or increase the refrigerant pressure loss.
【０００５】また、偏平チューブ（51）とヘッダー（5
4）との一括ろう付けにおいて、ろう材が、幅方向両サ
イドの狭くなった熱交換媒体通路孔（56a ）（56a ）に
流れ込んで該孔（56a ）（56a ）をつまらせてしまうこ
ともあった。The flat tube (51) and the header (5)
In the batch brazing with 4), the brazing material may flow into the narrowed heat exchange medium passage holes (56a) (56a) on both sides in the width direction and pinch the holes (56a) (56a). there were.
【０００６】本発明は、上記のような従来の問題点が鑑
み、偏平多孔管の端部絞り加工において、各熱交換媒体
通路孔に潰れ等の不本意な変形のないものにすることが
できる偏平多孔管の端部絞り加工方法を提供し、もっ
て、熱交換性能の向上、熱交換媒体の圧力損失の低下、
ろう付け時の孔づまり防止を実現することを課題とす
る。The present invention has been made in view of the above-mentioned conventional problems, and can prevent undesired deformation such as collapse of each heat exchange medium passage hole in end drawing of a flat porous tube. Provide an end drawing method of a flat perforated tube, thereby improving heat exchange performance, reducing pressure loss of a heat exchange medium,
It is an object to prevent hole clogging during brazing.
【０００７】[0007]
【課題を解決するための手段】上記課題は、幅方向に複
数の熱交換媒体通路孔を有する偏平多孔管の長手方向の
端部を、少なくとも幅方向に縮小するように絞り加工す
る工程と、該偏平多孔管の端部外周面を変形阻止状態に
拘束した状態で、該偏平多孔管の各熱交換媒体通路孔に
その端部より同時に矯正用のピンを差し込み状態に介在
させることによって、前記熱交換媒体通路孔を矯正する
工程を実施することを特徴とする偏平多孔管の端部絞り
加工方法によって解決される。SUMMARY OF THE INVENTION The object of the present invention is to provide a flat porous tube having a plurality of heat exchange medium passage holes in the width direction by drawing at least a longitudinal end portion so as to reduce at least the width direction. In a state where the outer peripheral surface of the end portion of the flat porous tube is restrained in a deformation preventing state, a pin for straightening is inserted into each heat exchange medium passage hole of the flat porous tube from the end at the same time so as to intervene in the state. The problem is solved by a method of drawing an end portion of a flat perforated pipe, wherein a step of correcting a heat exchange medium passage hole is performed.
【０００８】上記方法では、幅方向に縮小する絞り加工
工程と、偏平多孔管の各熱交換媒体通路孔にその端部よ
り同時に矯正用のピンを差し込み状態に介在させる工程
とを実施することにより、前記絞り加工による熱交換媒
体通路孔の潰れ等の不本意な変形が矯正用のピンの介在
によって矯正され、各熱交換媒体通路孔が潰れ等の不本
意な変形のないものになる。In the above method, a drawing step of reducing in the width direction and a step of inserting a straightening pin into each heat exchange medium passage hole of the flat perforated tube from the end thereof at the same time in a state of being inserted are carried out. In addition, undesired deformation such as collapse of the heat exchange medium passage hole due to the drawing process is corrected by the intervention of the correcting pin, and each heat exchange medium passage hole is free from undesired deformation such as collapse.
【０００９】しかも、ピンを差込み状態に介在させての
矯正は、偏平多孔管の端部外周面を変形阻止状態に拘束
した状態で行うものとしていることにより、ピンの介在
によって偏平多孔管の端部外周形状に狂いを生じるのも
防止され、端部が幅方向に適正に縮小された偏平多孔管
が得られる。Moreover, the correction with the pin interposed in the inserted state is performed while the outer peripheral surface of the end of the flat porous tube is restrained in the deformation preventing state. It is also possible to prevent the outer peripheral shape from being deviated, and to obtain a flat perforated tube whose ends are appropriately reduced in the width direction.
【００１０】また、上記方法は、偏平多孔管よりも幅狭
の絞り加工用の凹部を有すると共に、該凹部の底面に矯
正用の前記ピンが立設された絞り加工金型を用い、偏平
多孔管の長手方向の端部を該絞り加工金型の凹部内に挿
入していくことによって絞り加工するとともに、偏平多
孔管の端部外周面を金型の凹部周壁に変形阻止状態に拘
束しながら、偏平多孔管の各熱交換媒体通路孔に前記ピ
ンを差し込み状態に介在させて行うのがよい。これによ
り、偏平多孔管を絞り加工金型の凹部に挿入していくと
いう操作を行うだけで、端部が幅方向に適正に縮小さ
れ、かつ、各熱交換媒体通路孔に潰れ等の不本意な変形
のない適正な偏平多孔管が得られ、生産性が向上され
る。[0010] In addition, the above method uses a drawing die having a recess for drawing that is narrower than the flat perforated pipe and having the pin for straightening provided on the bottom surface of the recess. While drawing the end of the tube in the longitudinal direction by inserting it into the recess of the drawing die, the outer peripheral surface of the end of the flat porous tube is restrained by the peripheral wall of the recess of the die while preventing deformation. It is preferable that the pin be inserted into each of the heat exchange medium passage holes of the flat porous tube in a state of being inserted. By simply inserting the flat perforated tube into the recess of the drawing die, the end portion is appropriately reduced in the width direction, and the heat exchange medium passage holes are undesirably collapsed. An appropriate flat porous tube without any deformation is obtained, and the productivity is improved.
【００１１】更に、絞り加工前の偏平多孔管は、その幅
方向最外側の両熱交換媒体通路孔の横断面面積が、幅方
向中間部の熱交換媒体通路孔の横断面面積よりも大に設
定されているのがよい。これにより、幅方向縮小の絞り
加工をしても、幅方向最外側の熱交換媒体通路孔が不本
意に狭くなってしまうことがない。そのため、矯正用の
ピンの差込みによって該ピンに過度の力学的負担がかか
るのが防がれると共に、該ピンによる偏平多孔管の矯正
変形量を小さくし得て品質良好な偏平多孔管が得られ
る。Further, in the flat porous tube before drawing, the cross-sectional area of the outermost heat exchange medium passage holes in the width direction is larger than the cross-sectional area of the heat exchange medium passage hole in the middle part in the width direction. It should be set. Thereby, even if the drawing process is performed to reduce the width, the outermost heat exchange medium passage hole in the width direction is not unintentionally narrowed. Therefore, it is possible to prevent an excessive mechanical load from being imposed on the pin due to the insertion of the pin for straightening, and to reduce the amount of straightening deformation of the flat porous tube by the pin, thereby obtaining a flat porous tube having good quality. .
【００１２】[0012]
【発明の実施の形態】次に、本発明の実施形態を図面に
基づいて説明する。Next, embodiments of the present invention will be described with reference to the drawings.
【００１３】本実施形態における偏平多孔管は、例えば
カーエアコン用凝縮器などに用いられるマルチフロータ
イプの熱交換器などにおいて、その熱交換用チューブと
して用いられるものである。図４（イ）（ロ）に示され
るように、該偏平多孔管（３）は、アルミニウム製の円
筒状中空ヘッダー（１）の周壁に周方向スリット状に形
成されたチューブ挿入孔（２）を通じて、その端部が、
ヘッダー（１）内に挿入され、一括ろう付けによりヘッ
ダー（１）と内部連通状態に接合一体化されてマルチフ
ロータイプの熱交換器を構成する。該偏平多孔管（３）
は、その長手方向の端部が絞り加工により幅方向に縮小
されており、その縮小端部の幅方向両サイドに形成され
た基端段部（４）が、ヘッダー（１）のチューブ挿入孔
（２）の周縁部に当接され、偏平多孔管（３）の端部の
挿入量が自動設定されるようになされている。The flat perforated tube according to the present embodiment is used as a heat exchange tube in a multi-flow type heat exchanger used for a condenser for a car air conditioner, for example. As shown in FIGS. 4 (a) and 4 (b), the flat porous tube (3) has a tube insertion hole (2) formed in a circumferential slit shape on the peripheral wall of a cylindrical hollow header (1) made of aluminum. Through the end,
The multi-flow type heat exchanger is inserted into the header (1) and integrally joined to the header (1) in a state of internal communication by batch brazing. The flat perforated tube (3)
The end in the longitudinal direction is reduced in the width direction by drawing, and the base end step (4) formed on both sides in the width direction of the reduced end is provided with a tube insertion hole of the header (1). The abutment is made on the periphery of (2), and the insertion amount of the end of the flat porous tube (3) is automatically set.
【００１４】本実施形態では、上記のような偏平多孔管
（３）の端部絞り加工を次のようにして実施する。In the present embodiment, the end drawing of the flat porous tube (3) as described above is performed as follows.
【００１５】即ち、絞り加工前の偏平多孔管は、図１
（イ）に示されるように、幅方向に複数、例えば図示の
場合５つの熱交換媒体通路孔（５）…（5a）（5a）を有
するアルミニウム押出材による、横断面外周形状が長円
状の管である。この偏平多孔管（３）において、幅方向
中間部の各熱交換媒体通路孔（５）…は横断面円形状に
形成され、互いに同じサイズに設計されている。また、
幅方向最外側の各熱交換媒体通路孔（5a）（5a）は、後
述する絞り加工において、絞り加工後の通路孔（5a）
（5a）の横断面形状及び横断面積が幅方向中間部の各熱
交換媒体通路孔（５）…の横断面形状及び横断面積と同
じものになるようにすることを見込んで設計されてお
り、長径方向を幅方向に向けた長円状ないし楕円状の横
断面形状を有してその各横断面積が幅方向中間部の各熱
交換媒体通路孔（５）…よりも大きく設計されている。That is, the flat porous tube before drawing is shown in FIG.
As shown in (a), an aluminum extruded material having a plurality of, for example, five heat exchange medium passage holes (5)... (5a) (5a) in the width direction has an elliptical cross-sectional outer peripheral shape. Tube. In the flat porous tube (3), the heat exchange medium passage holes (5) at the middle portion in the width direction are formed in a circular cross section and are designed to have the same size. Also,
Each heat exchange medium passage hole (5a) (5a) on the outermost side in the width direction is a passage hole (5a) after drawing in drawing described later.
The cross-sectional shape and the cross-sectional area of (5a) are designed to be the same as the cross-sectional shape and the cross-sectional area of each heat exchange medium passage hole (5). It is designed to have an elliptical or elliptical cross-sectional shape with its major axis directed in the width direction, and each cross-sectional area is larger than each of the heat exchange medium passage holes (5) at the middle part in the width direction.
【００１６】このような構造の偏平多孔管（３）を用
い、その端部を幅方向に縮小するように絞り加工する。
この絞り加工は、図２に示されるような絞り加工金型
（６）を用いる。この金型（６）は、上記の偏平多孔管
（３）よりも幅狭の絞り加工用凹部（７）を有する。こ
の凹部（７）の入口側を除く内方側は、平面視長円状を
なし、その長径方向の長さが偏平多孔管（３）の幅より
も狭く、短径方向の長さが偏平多孔管（３）の高さと同
等に設計されている。また、この凹部（７）の入口側
は、その長径方向の両周壁部が外方に傾斜（９）（９）
されており、この傾斜面（９）（９）が絞り用の傾斜面
とされている。そして、該凹部（７）の底面には、偏平
多孔管（３）の各通路孔（５）…（5a）（5a）を矯正す
る円形の矯正ピン（10）…が立設されている。各矯正ピ
ン（10）…の高さは、その上端部が絞り用傾斜面（９）
（９）よりも下方に位置するように設定されている。ま
た、各矯正ピン（10）…の横断面形状・サイズは互いに
同じものに設計されている。Using the flat porous tube (3) having such a structure, drawing is performed so that the end is reduced in the width direction.
For this drawing, a drawing die (6) as shown in FIG. 2 is used. The mold (6) has a drawing recess (7) narrower than the flat porous tube (3). The inner side of the recess (7) except for the inlet side has an oblong shape in plan view, the length in the major axis direction is smaller than the width of the flat porous tube (3), and the length in the minor axis direction is flat. It is designed to have the same height as the perforated pipe (3). On the entrance side of the concave portion (7), both peripheral wall portions in the major diameter direction are inclined outward (9) (9).
The inclined surfaces (9) and (9) are used as aperture inclined surfaces. On the bottom surface of the concave portion (7), circular correction pins (10) for correcting the passage holes (5), (5a), (5a) of the flat porous tube (3) are provided upright. The height of each straightening pin (10) is the upper end of the slope (9).
It is set to be located lower than (9). The cross-sectional shapes and sizes of the correction pins (10) are designed to be the same.
【００１７】上記偏平多孔管（３）の端部の絞り加工
は、この金型（６）を用い、次のようにして行う。即
ち、図１（イ）に示されるように、偏平多孔管（３）の
長手方向の端部を金型（６）の凹部（７）内に挿入して
いく。すると、図１（ロ）に示されるように、偏平多孔
管（３）の端部は、その先端部から、幅方向の両側が、
金型凹部（７）の入口側の絞り傾斜面（９）（９）によ
って幅方向に縮小され絞り加工されていく。この絞り加
工によって、この絞り加工部分において偏平多孔管
（３）の内部の各熱交換媒体通路孔（５）…（5a）（5
a）に変形を生じる。特に、幅方向最外側の熱交換媒体
通路孔（5a）（5a）には比較的大きな変形を生じて通路
面積が縮小変形される。そこで更に、偏平多孔管（３）
を更に内方に挿入していくことにより、図１（ハ）に示
されるように、差込みピン（10）…が偏平多孔管（３）
の各冷媒通路孔（５）…（5a）（5a）に差し込まれる。
これらピン（10）…の差込みによって各熱交換媒体通路
孔（５）…（5a）（5a）が適正な形状の孔に矯正され
る。特に、幅方向最外側の熱交換媒体通路孔（5a）（5
a）は、ピン（10）…の差込みによって適正な形状の孔
に矯正される。The drawing process of the end of the flat porous tube (3) is performed as follows using this mold (6). That is, as shown in FIG. 1 (a), the longitudinal end of the flat porous tube (3) is inserted into the recess (7) of the mold (6). Then, as shown in FIG. 1 (b), the ends of the flat perforated pipe (3) extend from the front end to both sides in the width direction.
The drawing is reduced in the width direction by the drawing inclined surfaces (9) and (9) on the entrance side of the mold concave portion (7) and drawing is performed. By this drawing, each of the heat exchange medium passage holes (5)... (5a) (5) inside the flat perforated pipe (3) at the drawn part.
a) is deformed. In particular, a relatively large deformation occurs in the heat exchange medium passage holes (5a) (5a) on the outermost side in the width direction, and the passage area is reduced and deformed. Therefore, the flat perforated tube (3)
Is inserted further inward, and as shown in FIG. 1 (c), the insertion pins (10)...
(5) ... (5a) and (5a).
By inserting these pins (10), the heat exchange medium passage holes (5), (5a), (5a) are corrected into holes having appropriate shapes. In particular, the outermost heat exchange medium passage holes (5a) (5
a) is corrected into a hole having an appropriate shape by inserting the pins (10).
【００１８】以上のようにして、図３（ロ）に示される
ように、端部が幅方向に縮小され、該端部における各熱
交換媒体通路孔（５）…（5a）（5a）が互いに円形で横
断面積の等しい偏平多孔管（３）が得られる。As described above, as shown in FIG. 3B, the end is reduced in the width direction, and the heat exchange medium passage holes (5)... (5a) (5a) at the end are formed. A flat perforated pipe (3) having a circular cross section and an equal cross-sectional area is obtained.
【００１９】以上の説明のように、上記実施形態は、偏
平多孔管（３）の端部に幅方向が縮小する絞り加工を実
施したのち、偏平多孔管（３）の各熱交換媒体通路孔
（５）…（5a）（5a）にその端部より矯正用のピン（1
0）…を同時に差し込むものとしているから、幅方向縮
小の絞り加工による熱交換媒体通路孔（５）…（5a）
（5a）の潰れ等の不本意な変形を矯正することができ、
各熱交換媒体通路孔（５）…（5a）（5a）が潰れ等の不
本意な変形のないものになり、熱交換性能の向上、熱交
換媒体の圧力損失の低下、ろう付け時の孔づまり防止を
実現し得る。As described above, in the above-described embodiment, after performing the drawing process in which the width direction is reduced at the end of the flat porous tube (3), each heat exchange medium passage hole of the flat porous tube (3). (5) ... (5a) At (5a), insert a pin (1
0) are inserted at the same time, so the heat exchange medium passage holes (5) ... (5a) formed by drawing in the width direction are reduced.
(5a) can correct undesired deformation such as crushing,
Each heat exchange medium passage hole (5) ... (5a) (5a) is free from unintentional deformation such as crushing, so that heat exchange performance is improved, pressure loss of the heat exchange medium is reduced, and holes for brazing. Prevention of jamming can be realized.
【００２０】しかも、ピン（10）…の差込みは、偏平多
孔管（３）の端部外周面を金型（６）の凹部（７）の内
方周壁にて変形阻止状態に拘束した状態で行うものとし
ているから、ピン（10）…の差込みによって偏平多孔管
（３）の端部外周形状に狂いを生じるのを防止すること
ができ、端部が幅方向に適正に縮小された偏平多孔管
（３）を得ることができる。Further, the pins (10) are inserted while the outer peripheral surface of the end of the flat porous tube (3) is restrained by the inner peripheral wall of the concave portion (7) of the mold (6) in a deformation preventing state. It is possible to prevent the end outer peripheral shape of the flat perforated tube (3) from being distorted due to the insertion of the pin (10). The flat perforated tube whose end is appropriately reduced in the width direction. A tube (3) can be obtained.
【００２１】特に、絞り加工用の凹部（７）の底面に矯
正用のピン（10）…が立設された絞り加工金型（６）を
用いているから、偏平多孔管（３）を絞り加工金型
（６）の凹部（７）に挿入していくという操作を行うだ
けで、端部が幅方向に適正に縮小され、かつ、各熱交換
媒体通路孔が潰れ等の不本意な変形のない適正な偏平多
孔管（３）が得られ、加工を生産性良く遂行していくこ
とができる。In particular, since the drawing die (6) in which straightening pins (10)... Are provided on the bottom surface of the drawing recess (7) is used, the flat porous tube (3) is drawn. By simply performing the operation of being inserted into the concave portion (7) of the processing die (6), the end portion is appropriately reduced in the width direction, and each heat exchange medium passage hole is undesirably deformed such as collapsed. An appropriate flat perforated pipe (3) free of defects can be obtained, and processing can be performed with high productivity.
【００２２】更に、絞り加工前の偏平多孔管（３）は、
その幅方向最外側の両熱交換媒体通路孔（5a）（5a）の
横断面面積を、幅方向中間部の熱交換媒体通路孔（５）
…の横断面面積よりも大に設定しているから、幅方向縮
小の絞り加工をしても、幅方向最外側の熱交換媒体通路
孔（5a）（5a）が不本意に狭くなってしまうことがな
く、そのため、矯正用のピンの差込みにおいて該ピン
（10）…に過度の力学的負担がかかるのを防止すること
ができると共に、該ピン（10）…による偏平多孔管の矯
正変形量を小さくし得て品質良好な偏平多孔管を得るこ
とができる。しかも、偏平多孔管（３）の端部の各熱交
換媒体通路孔（５）…（5a）（5a）の横断面積、横断面
形状を同じものになし得て、各熱交換媒体通路孔（５）
…（5a）（5a）を通過する熱交換媒体の流量を均等化さ
せることができる。Further, the flat porous tube (3) before drawing is
The cross-sectional area of each of the outermost heat exchange medium passage holes (5a) (5a) in the width direction is set to the heat exchange medium passage hole (5)
Are set to be larger than the cross-sectional area of..., The outermost heat exchange medium passage holes (5a) (5a) in the width direction are undesirably narrowed even if the drawing process is performed in the width direction. Therefore, it is possible to prevent an excessive mechanical load from being applied to the pin (10) when inserting the pin for correction, and to correct the deformation of the flat porous tube by the pin (10). And a flat perforated tube of good quality can be obtained. Moreover, the cross-sectional area and cross-sectional shape of each heat exchange medium passage hole (5)... (5a) (5a) at the end of the flat porous tube (3) can be made the same, and each heat exchange medium passage hole (5 5)
(5a) The flow rate of the heat exchange medium passing through (5a) can be equalized.
【００２３】また、ピン（10）の差込みはすべての通路
孔（５）…（5a）（5a）に対して行うものとしているか
ら、一つの通路孔（5a）に対するピン（10）の差込みに
よって他の通路孔（５）にこの矯正による変形が及んで
該通路孔（５）を狭くしてしまうというような派生的不
都合の発生を防ぐことができる。Since the pin (10) is inserted into all the passage holes (5)... (5a) (5a), the insertion of the pin (10) into one passage hole (5a) is performed. It is possible to prevent the occurrence of a secondary inconvenience such as the deformation of the other passage hole (5) due to the correction and the narrowing of the passage hole (5).
【００２４】なお、図１〜４に示した実施形態では、ま
ず偏平多孔管（３）の絞り加工を行ったのち、熱交換媒
体通路孔（５）…（5a）（5a）にピンを差し込むものと
して説明したが、矯正用のピン（10）の高さを高くし
て、絞り加工前にピン（10）を予め熱交換媒体通路孔
（５）…（5a）（5a）に差し込むものとしても良い。ま
た、絞り加工を行った後、孔矯正を行うものとして説明
したが、絞り加工と孔矯正とを同時的に行うものとして
も良い。In the embodiment shown in FIGS. 1 to 4, after the flat perforated pipe (3) is first drawn, the pins are inserted into the heat exchange medium passage holes (5)... (5a) (5a). As described above, the height of the straightening pin (10) is increased, and the pin (10) is inserted into the heat exchange medium passage holes (5)... (5a) (5a) before drawing. Is also good. In addition, although it has been described that the hole correction is performed after the drawing, the drawing and the hole correction may be performed simultaneously.
【００２５】図５には、他の実施形態方法を示す。本方
法では、まず、図５（イ）（ロ）に示されるように、差
込みピンの設けられていない金型（11）を用いて、偏平
多孔管（３）の端部を絞り加工する。しかるのち、図５
（ハ）（ニ）に示されるように、絞り加工された偏平多
孔管（３）の端部を差込みピン（10）…の備えられてい
る金型（６）に挿入することによって、該差込みピン
（10）…を各熱交換媒体通路孔（５）…（5a）（5a）に
差し込む。このように、絞り加工と、ピンによる矯正加
工とを異なる金型（11）（６）を用いて別工程として行
うようにしてもよい。FIG. 5 shows another embodiment method. In this method, first, as shown in FIGS. 5A and 5B, the end of the flat perforated tube 3 is drawn using a mold 11 provided with no insertion pin. Fig. 5
(C) As shown in (d), the end of the drawn flat perforated pipe (3) is inserted into a mold (6) provided with insertion pins (10). Insert the pins (10) into the heat exchange medium passage holes (5) (5a) (5a). As described above, the drawing process and the straightening process using the pin may be performed as separate processes using different molds (11) and (6).
【００２６】以上に本発明の実施形態を示したが、本発
明はこれに限定されるものではなく、各種変形が可能で
ある。例えば、上記実施形態では、絞り加工しようとす
る偏平多孔管（３）は、その幅方向最外側の熱交換媒体
通路孔（5a）（5a）の横断面積が、幅方向中間部の熱交
換媒体通路孔（５）…の横断面積よりも大きく設計され
ているが、すべての熱交換媒体通路孔（５）…（5a）
（5a）を同じサイズに設計してもよい。その場合、絞り
加工によって潰れを生じた最外側の熱交換媒体通路孔
（5a）（5a）は最外側の差込みピン（10）（10）によっ
て押し広げられて矯正される。また、上記実施形態で
は、押出材による偏平多孔管を用いているが、押出材に
限られるものではない。また、上記実施形態では、偏平
多孔管（３）の端部をその幅方向にのみ絞り加工する場
合について、説明しているが、幅方向及び高さ方向の両
方向において絞り加工するものとしてもよい。Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible. For example, in the above embodiment, the cross-sectional area of the outermost heat exchange medium passage holes (5a) (5a) in the widthwise outermost portion of the flat porous tube (3) to be drawn is the heat exchange medium in the middle part in the widthwise direction. Designed to be larger than the cross-sectional area of the passage holes (5), but all the heat exchange medium passage holes (5) ... (5a)
(5a) may be designed to be the same size. In that case, the outermost heat exchange medium passage holes (5a) (5a) that have been crushed by the drawing process are expanded and corrected by the outermost insertion pins (10) (10). In the above embodiment, a flat porous tube made of an extruded material is used, but the invention is not limited to the extruded material. Further, in the above embodiment, the case where the end of the flat porous tube (3) is drawn only in the width direction is described, but the drawing may be performed in both the width direction and the height direction. .
【００２７】[0027]
【発明の効果】上述の次第で、本発明の偏平多孔管の端
部絞り加工方法は、幅方向に複数の熱交換媒体通路孔を
有する偏平多孔管の長手方向の端部を、少なくとも幅方
向に縮小するように絞り加工する工程と、偏平多孔管の
各熱交換媒体通路孔にその端部より同時に矯正用のピン
を差し込み状態に介在させることによって、前記熱交換
媒体通路孔を矯正する工程を実施するものであるから、
幅方向縮小の絞り加工による熱交換媒体通路孔の潰れ等
の不本意な変形が矯正用のピンの介在によって矯正され
て各熱交換媒体通路孔が潰れ等の不本意な変形のないも
のになり、熱交換性能の向上、熱交換媒体の圧力損失の
低下、ろう付け時の孔づまり防止を実現することができ
る。As described above, according to the method for drawing an end of a flat perforated pipe of the present invention, the end of the flat perforated pipe having a plurality of heat exchange medium passage holes in the width direction is formed at least in the width direction. Drawing step so as to reduce the size of the heat exchange medium passage hole, and inserting the straightening pin into each heat exchange medium passage hole of the flat perforated tube at the same time from the end of the heat exchange medium passage hole so as to interpose the heat exchange medium passage hole. Because it implements
Undesired deformation such as collapse of the heat exchange medium passage hole due to the drawing process in the width direction is corrected by the intervention of the correcting pin, so that each heat exchange medium passage hole is free from undesired deformation such as collapse. It is possible to improve the heat exchange performance, reduce the pressure loss of the heat exchange medium, and prevent clogging of holes at the time of brazing.
【００２８】しかも、ピンを差込み状態に介在させるこ
とによる熱交換媒体通路孔の矯正は、偏平多孔管の端部
外周面を変形阻止状態に拘束した状態で行うものとして
いるから、ピンの介在によって、偏平多孔管の端部外周
形状に狂いを生じるのを防止することができ、端部が幅
方向に適正に縮小された偏平多孔管を得ることができ
る。Further, since the heat exchange medium passage hole is corrected by inserting the pin in the inserted state, the end outer peripheral surface of the flat porous tube is restrained in the deformation preventing state. In addition, it is possible to prevent the outer peripheral shape of the flat porous tube from being out of order, and to obtain a flat porous tube whose end portion is appropriately reduced in the width direction.
【００２９】また、上記方法は、偏平多孔管よりも幅狭
の絞り加工用の凹部を有すると共に、該凹部の底面に矯
正用の前記ピンが立設された絞り加工金型を用い、偏平
多孔管の長手方向の端部を該絞り加工金型の凹部内に挿
入していくことによって絞り加工するとともに、偏平多
孔管の端部外周面を金型の凹部周壁に変形阻止状態に拘
束しながら、偏平多孔管の各熱交換媒体通路孔に前記ピ
ンを差し込み状態に介在させるものとすることにより、
偏平多孔管を絞り加工金型の凹部に挿入していくという
操作を行うだけで、端部が幅方向に適正に縮小され、か
つ、各熱交換媒体通路孔が潰れ等の不本意な変形のない
適正な偏平多孔管が得られ、加工を生産性良く遂行して
いくことができる。Further, the above-mentioned method uses a drawing die having a drawing recess having a width narrower than that of the flat perforated tube and having the above-mentioned pin for correction standing upright on the bottom surface of the recess. While drawing the end of the tube in the longitudinal direction by inserting it into the recess of the drawing die, the outer peripheral surface of the end of the flat porous tube is restrained by the peripheral wall of the recess of the die while preventing deformation. By inserting the pin into each heat exchange medium passage hole of the flat perforated tube in the inserted state,
By simply inserting the flat perforated tube into the recess of the drawing die, the end portion is properly reduced in the width direction, and each heat exchange medium passage hole is undesirably deformed such as collapsed. An appropriate flat perforated pipe can be obtained, and the processing can be performed with high productivity.
【００３０】更に、絞り加工前の偏平多孔管は、その幅
方向最外側の両熱交換媒体通路孔の横断面面積が、幅方
向中間部の熱交換媒体通路孔の横断面面積よりも大に設
定されているものとすることにより、幅方向縮小の絞り
加工をしても、幅方向最外側の熱交換媒体通路孔が不本
意に狭くなってしまうことがなく、そのため、矯正用の
ピンの差込みによって該ピンに過度の力学的負担がかか
るのを防止することができると共に、該ピンによる偏平
多孔管の矯正変形量を小さくし得て品質良好な偏平多孔
管を得ることができる。Further, in the flat porous tube before drawing, the cross-sectional area of the outermost heat exchange medium passage holes in the width direction is larger than the cross-sectional area of the heat exchange medium passage hole in the widthwise middle part. By setting it, even when drawing in the width direction is reduced, the heat exchange medium passage hole on the outermost side in the width direction is not unintentionally narrowed. It is possible to prevent an excessive mechanical load from being applied to the pin due to the insertion, and to reduce the amount of correction deformation of the flat porous tube by the pin, thereby obtaining a flat porous tube having good quality.
【図面の簡単な説明】[Brief description of the drawings]
【図１】図（イ）ないし図（ハ）は、一実施形態に係る
方法の手順を順次に示す断面図である。FIGS. 1A to 1C are cross-sectional views sequentially illustrating a procedure of a method according to an embodiment.
【図２】絞り加工用金型を示す断面図である。FIG. 2 is a sectional view showing a drawing die.
【図３】絞り加工された偏平多孔管を示すもので、図
（イ）は平面図、図（ロ）は図（イ）のＩ−Ｉ線矢視
図、図（ハ）は図（イ）のＩＩ−ＩＩ線断面図である。FIGS. 3A and 3B show a drawn flat perforated tube, in which FIG. 1A is a plan view, FIG. 2B is a view taken along line II of FIG. 1A, and FIG. 2) is a sectional view taken along line II-II.
【図４】端部絞り加工された偏平多孔管が組み込まれた
熱交換器を示すもので、図（イ）は平面断面図、図
（ロ）は正面断面図である。FIGS. 4A and 4B show a heat exchanger incorporating a flat perforated tube having an end drawn, wherein FIG. 4A is a plan sectional view and FIG. 4B is a front sectional view.
【図５】図（イ）ないし図（ニ）は他の実施形態に係る
方法の手順を順次に示す断面図である。5A to 5D are cross-sectional views sequentially showing the procedure of a method according to another embodiment.
【図６】従来例を示すもので、図（イ）は偏平多孔管の
平面図、端面図、図（ロ）は絞り加工した偏平多孔管の
平面図、端面図、図（ハ）は該偏平多孔管を中空ヘッダ
ーのチューブ挿入孔に挿入した状態の熱交換器の平面断
面図である。6 (a) is a plan view of a flat porous tube, an end view thereof, and FIG. 6 (b) is a plan view, an end view, and FIG. It is a plane sectional view of a heat exchanger in the state where a flat perforated tube was inserted in a tube insertion hole of a hollow header.
３…偏平多孔管 ５、５ａ…熱交換媒体通路孔 ６…絞り加工用金型 ７…絞り加工用凹部 １０…差込みピン DESCRIPTION OF SYMBOLS 3 ... Flat porous tube 5, 5a ... Heat exchange medium passage hole 6 ... Drawing die 7 ... Drawing concave part 10 ... Insertion pin
Claims (3)
る偏平多孔管の長手方向の端部を、少なくとも幅方向に
縮小するように絞り加工する工程と、 該偏平多孔管の端部外周面を変形阻止状態に拘束した状
態で、該偏平多孔管の各熱交換媒体通路孔にその端部よ
り同時に矯正用のピンを差し込み状態に介在させること
によって、前記熱交換媒体通路孔を矯正する工程を実施
することを特徴とする偏平多孔管の端部絞り加工方法。1. A step of drawing a longitudinal end portion of a flat porous tube having a plurality of heat exchange medium passage holes in a width direction so as to reduce at least the width direction, and an outer periphery of the end portion of the flat porous tube. The heat exchange medium passage hole is straightened by simultaneously inserting a straightening pin into each heat exchange medium passage hole of the flat porous tube from its end in a state where the surface is restrained in the deformation preventing state. A method for drawing an end of a flat perforated pipe, comprising performing a step.
の凹部を有すると共に、該凹部の底面に矯正用の前記ピ
ンが立設された絞り加工金型を用い、 偏平多孔管の長手方向の端部を該絞り加工金型の凹部内
に挿入していくことによって絞り加工するとともに、偏
平多孔管の端部外周面を金型の凹部周壁に変形阻止状態
に拘束しながら、偏平多孔管の各熱交換媒体通路孔に前
記ピンを差し込み状態に介在させる請求項１に記載の偏
平多孔管の端部絞り加工方法。2. A longitudinal drawing of a flat perforated pipe having a concavity for drawing which is narrower than the flat perforated pipe, and a drawing die in which the pin for straightening is provided on a bottom surface of the concave. Direction by inserting the end in the direction into the concave portion of the drawing die, while restricting the outer peripheral surface of the end of the flat porous tube to the peripheral wall of the concave portion of the die while preventing the flat porous tube from deforming. The end drawing method for a flat perforated pipe according to claim 1, wherein the pin is inserted into each heat exchange medium passage hole of the pipe in a state of being inserted.
方向最外側の両熱交換媒体通路孔の横断面面積が、幅方
向中間部の熱交換媒体通路孔の横断面面積よりも大に設
定されている請求項１又は請求項２に記載の偏平多孔管
の端部絞り加工方法。3. The flat porous tube before drawing has a cross-sectional area of the outermost heat exchange medium passage holes in the width direction which is larger than a cross-sectional area of the heat exchange medium passage holes in the widthwise middle part. The end drawing method for a flat perforated pipe according to claim 1 or 2, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27014396A JP3797717B2 (en) | 1996-10-11 | 1996-10-11 | End drawing method of flat porous tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27014396A JP3797717B2 (en) | 1996-10-11 | 1996-10-11 | End drawing method of flat porous tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10113731A true JPH10113731A (en) | 1998-05-06 |
| JP3797717B2 JP3797717B2 (en) | 2006-07-19 |
Family
ID=17482152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27014396A Expired - Fee Related JP3797717B2 (en) | 1996-10-11 | 1996-10-11 | End drawing method of flat porous tube |
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| Country | Link |
|---|---|
| JP (1) | JP3797717B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005156069A (en) * | 2003-11-27 | 2005-06-16 | Toyo Radiator Co Ltd | Heat exchanger and its manufacturing method |
| JP2013134993A (en) * | 2011-12-22 | 2013-07-08 | Samsung Sdi Co Ltd | Battery module |
| CN103567311A (en) * | 2012-08-06 | 2014-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Opening reducing device and processing method for reducing opening of air suction pipe of compressor |
| CN104889276A (en) * | 2015-05-25 | 2015-09-09 | 安徽金三环金属科技有限公司 | Flat tube necking machine |
| JP5947436B1 (en) * | 2015-09-02 | 2016-07-06 | Ｓ．Ｐ．エンジニアリング株式会社 | Porous body assembly and method for manufacturing the same |
| JPWO2021070312A1 (en) * | 2019-10-10 | 2021-04-15 | ||
| WO2021124390A1 (en) * | 2019-12-16 | 2021-06-24 | 三菱電機株式会社 | Heat exchanger, heat exchanger unit, and refrigeration cycle device |
-
1996
- 1996-10-11 JP JP27014396A patent/JP3797717B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005156069A (en) * | 2003-11-27 | 2005-06-16 | Toyo Radiator Co Ltd | Heat exchanger and its manufacturing method |
| JP2013134993A (en) * | 2011-12-22 | 2013-07-08 | Samsung Sdi Co Ltd | Battery module |
| CN103567311A (en) * | 2012-08-06 | 2014-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Opening reducing device and processing method for reducing opening of air suction pipe of compressor |
| CN103567311B (en) * | 2012-08-06 | 2015-07-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Opening reducing device and processing method for reducing opening of air suction pipe of compressor |
| CN104889276A (en) * | 2015-05-25 | 2015-09-09 | 安徽金三环金属科技有限公司 | Flat tube necking machine |
| JP5947436B1 (en) * | 2015-09-02 | 2016-07-06 | Ｓ．Ｐ．エンジニアリング株式会社 | Porous body assembly and method for manufacturing the same |
| JP2017047374A (en) * | 2015-09-02 | 2017-03-09 | Ｓ．Ｐ．エンジニアリング株式会社 | Porous body assembly and production method of the same |
| JPWO2021070312A1 (en) * | 2019-10-10 | 2021-04-15 | ||
| WO2021070312A1 (en) * | 2019-10-10 | 2021-04-15 | 三菱電機株式会社 | Heat exchanger, heat exchanger unit, refrigeration cycle apparatus, and heat exchange member manufacturing method |
| CN114585871A (en) * | 2019-10-10 | 2022-06-03 | 三菱电机株式会社 | Heat exchanger, heat exchanger unit, refrigeration cycle device, and method for manufacturing heat exchange member |
| WO2021124390A1 (en) * | 2019-12-16 | 2021-06-24 | 三菱電機株式会社 | Heat exchanger, heat exchanger unit, and refrigeration cycle device |
| JPWO2021124390A1 (en) * | 2019-12-16 | 2021-06-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3797717B2 (en) | 2006-07-19 |
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