JPS60238046A - Pipe expander - Google Patents

Pipe expander

Info

Publication number
JPS60238046A
JPS60238046A JP9437484A JP9437484A JPS60238046A JP S60238046 A JPS60238046 A JP S60238046A JP 9437484 A JP9437484 A JP 9437484A JP 9437484 A JP9437484 A JP 9437484A JP S60238046 A JPS60238046 A JP S60238046A
Authority
JP
Japan
Prior art keywords
pipe
mandrel
shaped member
collet
aluminum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9437484A
Other languages
Japanese (ja)
Inventor
Yoshimasa Ono
小野 義正
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Aluminium Co Ltd
Original Assignee
Nippon Aluminium Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Aluminium Co Ltd filed Critical Nippon Aluminium Co Ltd
Priority to JP9437484A priority Critical patent/JPS60238046A/en
Publication of JPS60238046A publication Critical patent/JPS60238046A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08Tube expanders
    • B21D39/20Tube expanders with mandrels, e.g. expandable

Abstract

PURPOSE:To expand a pipe without buckling with simple constitution by providing a collet-shaped member which flares radially to the top part of a mandrel and flaring the collet-shaped member in the pipe. CONSTITUTION:The expanding mandrel 12 consisting of a shaft 13 and a cylindrical pipe 14 is fitted into an aluminum pipe 11 fitted with fins. The collet- shaped member 25 which contacts with the front end of the pipe 14 slides forward when the pipe 14 is slid forward relative to the shaft 13. Then the flaring part 27 moves forward on the tapered surface of a top member 18 and flare forcibly to the outside peripheral side, thereby expanding the pipe 11 to a prescribed diameter from the inside. The mandrel 12 is moved backward while the part 27 is held flared. The pipe 11 is expanded by the part 27 and the mandrel 12 is rotated and drawn in this state from the pipe. The member 25 is automatically returned to the original attitude by a coil spring 30 and the part 27 is closed upon ending of drawing.

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明は例えば冷蔵庫、ルームエアコン等に使用される
熱交換用パイプの製造等に好適なバイブ拡管装置に関す
る。 (従来技術) 従来の熱交換用パイプの製造方法どしては、パイプにフ
ィンを通した後に、パイプの内径よりも大きいボールを
ワイヤーを用いて引抜いたり、パイプの内径J:りも太
いロッドを押込むことにJζリパイプにフィンを固定り
−る414成や、又パイプ内に液体を14人加圧してパ
イプの直径を拡大1−ることによりフィンを固定りる構
成が採用されでいる(例えば、特公昭56−32047
号、特開昭56−7704.0号)。 ところが熱交換用パイプはその放熱す(1能に鑑み、薄
いほうが好ましく、イのため上記構成ではボール等を通
す際にパイプが座屈を起こし)てしまうおそれがある。 又パイプ中に液体を封入覆る構成では、装置が大掛かり
となって一コスト高にtrることが避りられない。 (発明の目的) 簡単な構成で]スト高にhるごどがなく、しかもパイプ
が座屈を起こり心配のないバイブ拡管装置を提供する。 (発明の構成) 本発明は、直線状のマンドレルが拡管されるパイプの内
径J−りも僅かに小さい外径を有し、マンドレルの先頭
部に放射方向に拡開可能なコレラ1−状部拐を設け、コ
レラ1〜状部材内にパイプからのマンドレル引抜き時に
コ1ノッ1〜状部月を拡開しうる拡開機構を設りたこと
を特徴どするバイブ拡管袋内である。 (実施例) 第1図(矢印F方向が前7′I)において、直線状かつ
長尺のアルミパイプ11内に挿入されている拡管マンド
レル12(パイプ拡管装置)は中心部に中実のシャフト
13を右しでおり、シ(ノット13の外周側にはシャツ
1〜13どどもにマンドレルを形成する筒状のバイブ1
/lが囲動自在に嵌合している。バイブ14はアルミパ
イプ11の内径よりも僅かに小さい外径を右しており、
従ってアルミパイプ11内でバイブ1/Iは回転自在か
つ磨動自在となっている。。 シャツ1−13の前端部(先頭部)には僅かに小径の却
ねじ16が形成されでおり、雄ねじ16には11Ilね
じを有しかつ外径がシャツ1〜13ど同一の筒状部材1
7が!2!着している。筒状部材17の前半部には先頭
部材18の後端部に形成された〃1ねじ19が螺着して
おり、これににっで先頭部(418はシャフト13に夕
・1して一体内に連結されでいる。先頭部材18のうら
jlねじ19の前方には円筒部20が形成されており、
更に円筒面20の前端から前方に向かい聞くテーパ面2
1が31+続的に形成されている。先頭部材18の前端
(、二は、前方に球面が配置された半球部15が一体に
(Industrial Application Field) The present invention relates to a vibrator pipe expansion device suitable for manufacturing heat exchange pipes used in refrigerators, room air conditioners, etc., for example. (Prior art) Conventional methods for manufacturing heat exchange pipes include passing fins through the pipe and then pulling out a ball larger than the pipe's inner diameter using a wire, or using a rod with a diameter larger than the inner diameter of the pipe. The 414 structure fixes the fins to the Jζ re-pipe by pushing it in, and the fins are fixed by pressurizing the liquid inside the pipe and enlarging the diameter of the pipe. (For example, Special Publication No. 56-32047
No., JP-A-56-7704.0). However, the heat exchange pipe is preferably thinner in terms of heat dissipation (in view of its ability to dissipate heat). Therefore, in the above configuration, there is a risk that the pipe may buckle when a ball or the like is passed through it. Furthermore, in a structure in which a liquid is sealed and covered within the pipe, it is inevitable that the device will be large-scale and the cost will be high. (Objective of the Invention) To provide a vibrator pipe expanding device which has a simple configuration and does not cause a problem with the stroke height and does not cause the pipe to buckle. (Structure of the Invention) The present invention is characterized in that a straight mandrel has an outer diameter slightly smaller than the inner diameter of the pipe to be expanded, and a cholera 1-shaped part that can be expanded in the radial direction is provided at the top of the mandrel. This is a vibrator tube expansion bag characterized by providing a cholera 1-shaped member with an expanding mechanism capable of expanding the cholera 1-shaped member when the mandrel is pulled out from the pipe. (Example) In Fig. 1 (arrow F direction is 7'I), a tube expansion mandrel 12 (pipe expansion device) inserted into a straight and long aluminum pipe 11 has a solid shaft in the center. 13 to the right, and on the outer periphery of the knot 13 there is a cylindrical vibe 1 that forms a mandrel for the shirts 1 to 13.
/l is fitted in a movable manner. The vibrator 14 has an outer diameter slightly smaller than the inner diameter of the aluminum pipe 11,
Therefore, the vibrator 1/I is rotatable and movable within the aluminum pipe 11. . A slightly small-diameter thread 16 is formed at the front end (top part) of the shirt 1-13, and the male thread 16 has a cylindrical member 1 having an 11Il thread and having the same outer diameter as the shirts 1-13.
7! 2! I'm wearing it. A screw 19 formed at the rear end of the leading member 18 is screwed into the front half of the cylindrical member 17. It is connected inside the body.A cylindrical part 20 is formed at the back of the leading member 18 and in front of the jl screw 19.
Further, a tapered surface 2 is formed toward the front from the front end of the cylindrical surface 20.
1 is formed continuously 31+ times. The front end of the leading member 18 (2) is that the hemispherical part 15 with the spherical surface arranged in the front is integrally stepped.

【〕られている。 第1図の状態では、円筒面20の後端とバイブ14の前
端はF−ト」iiI′1而1−に配置され−(いる。円
筒面20には]レフ1−状部4Δ25の後部に形成され
た円筒部26が摺動自在に嵌合しており、円筒部26の
外径はバイブ14の外径と同一・に設定されている。円
筒部26の前端から前方に延在する拡開部27は内周面
がテーパ面21と同一傾斜を右するテーパ面どなってお
り、前端から後方の円筒部26に向かいマンドレル長手
方向に割溝28が円周方向等間隔に複数個設【ノられで
いる。拡開部27ど半球部15どの間において、先頭部
材18には二]イルスプリング30が嵌合しCおり、コ
イルスプリング30は半球部15の後端面で構成される
段部31と拡開部27の前端部どの間で縮設されで、コ
レラ1−状部月25を常時1す方にf1勢している。 拡管マンドレル12の後端部は例えば第2図に示すマン
ドレル駆動装買35に取伺【ノられる。第2図において
、ベース36の−1−血中央部にはべ一メ36の長手方
向ど平1−7にアルミパイプ11がq間隔を隔てて例え
ば4本fつ配置されており、このアルミパイプ11は外
部より搬)スコンベア37によって搬送されるJ、うに
なっている。ベース36上のアルミパイプ11の後方に
は図示しない駆動機構にJ:って駆動されるパイプ回転
駆動装置38が設【ノられ、パイプ回転駆動装置38は
アルミパイプ11の後端をアルミパイプ11の半径方向
弾性的に掴むとともに、アルミパイプ114所定速度で
回転さけるようになっている。 パイプ回転駆動装置38の後方にはベース36上に配置
されたアルミパイプ11と同心の位置に上記拡管マンド
レル12が配置されでおり、拡管マンドレル12の後端
部にはべ〜ス36十に配置 5− されたマンドレル駆動装置Fr35が設置′Jられてい
る。 拡管マンドレル12は図示しない駆動機構によって駆動
されるマンドレル駆動装置35により所定速度で回転さ
けられるとともV二、マンドレル駆動装置35の[方向
の移動によって拡管マンドレル12はパイプ回転駆動装
置i”j 38内を通りアルミパイ−111内に嵌合し
つるようにイ丁っている。 ベース36」二に配置されたアルミパイプブ11の前方
にはベース36の前部を2)ぐようにフィン切断挿入機
/IOが配置されており、フィン切断挿入機40内には
カッティング装置(図示せず)が内蔵されている。カッ
ティング装置では、フィン切断挿入機40の−し方より
供給される長尺かつ板状のフィン原板41を所定幅に切
断づるどどもに、その切断タイミングが適宜設定できる
ようになっている。なおフィン原板41には予め、図示
しないフィン抜きプレスにJ:って打抜かれた挿入孔4
4が所定位階に多数形成されている。 フィン切断挿入機40に対応するベース36の部分には
トランスファー42が設()られCおり、−〇 − 1〜ランスフアー/12には矩形の平板状冶具43が載
置されている。治具43の上面には、等間隔かつ左右方
向のi¥Ii 48が多数条設けられている。又1−ラ
ンスファー/I2は治具43を水平面上において矢印で
承り一方向に矩形を描くようにピッチ〕スリで移動さけ
うるJ:う(Jなっており、1〜ランスフアー/12の
一部であって前後方向に延在り−るトランスファ一部分
42aがフィン切断挿入機40の下を潜っている。 なお第2図の熱交換用パイプ製造装置で組立てられた熱
交換用パイプ/I5)はタフ1〜フイード46によって
側方に取出され、図示しないプレスベンダーに供給され
るようになっている。 作動を説明Jる。第2図におい゛C1搬送コンベア37
により平行かつ等間隔の状態で搬送されてきた4本1組
のアルミパイプ11は、図示のようにベース36上面の
中央部に前後方向かつ4η間隔に置かれる。続いてパイ
プ回転駆動装置38がアルミパイプ11の後端部を掴み
、マンドレル駆動装置35ににつて回転駆動される拡管
マンドレル12がパイプ回転駆動装置38内を通ってア
ルミパイプ11内に回転しながら嵌合する。 一方所定の形状に予め打抜かれた長尺のフィン原板41
は、第2図のフィン切1gi挿入機40内に設()られ
たカッティング載置に供給される。又1〜ランスフアー
42による移送によって−1へノンスノ7一部分42 
EI J−には空の冶具/13が配置されており、冶具
/13は1・”ノンスファ一部分4.2 aによるピッ
チ送りによって所定ピッグでフィン切断挿入機40の下
を後方に送られ゛(ゆく。フィン切断挿入機40内のカ
ッティング裂開ではフィン原板41を所定時間毎に所定
寸法に切断」)、形成された放熱フィン47を1枚ずつ
下方を通る治具43のWk1′IBに挿入しでゆく。放
熱フィン47は、放熱フィン47の所定枚数が等間隔に
配置されることにより1ブに1ツクを形成lノ、イのブ
1コックをブ[コック間の間隔を隔てて4個形成覆るよ
うに溝48に挿入される。 1〜ランスフア一部分42 aによって治具43が後方
に移動すると、放熱フィン47に予め形成されてい!、
:挿入孔/I/lがアルミパイプ11に(の前端より嵌
合する。このどぎ、その挿入作業を容易ならしめるため
、アルミパイプ11はパイプ回転駆動装置38にJ:っ
て拡管マンドレル12どともに回転させられる。全放熱
フィン47のアルミパイプ11への嵌合が完了すると、
次に拡管作業を行なう。 第1図に示すJ:うにアルミバイブ11内に嵌合する拡
管マンドレル12におい(−、マント1ノル駆動装置3
5(第2図)の作動によってシャツ1〜13に対しパイ
プ14が1)1[方に摺動さIJられるど、パイプ14
の前端に当接覆る=ルーツ1〜状部月25が前方に摺動
する。これにより拡開部27が先頭部材18のテーパ面
21上を前りに移動して外周側へ強制的に拡開しく第2
図の仮想線27aの状態)、アルミパイプ11は内側か
ら拡開部27によって所定の直径に拡管されることにな
る1、なお拡開部27の拡開程度は、円筒部26の前り
への摺動が円筒部20と1−パ面21間の境11′c制
限されることによって一定している。 −〇 − 拡間部27が拡開し1=状態で、マント1ノル駆動装置
?f 3 F)(第2図)が後1ノに移1lIIJηる
ど拡管マンドレル12も一体的に後プノに移動し、拡開
部27に」:リアルミパイプ11を拡管しつつ拡管マン
ドレル12がアルミパイ111から引抜かれる。このと
き拡管マンドレル12を回転さl!ながら引扱くことに
j;って、引1にきを容易にする。又このとぎパイプ1
/Iがアルミパイプ11を内周側から支えているので、
アルミパイプ11が座屈するおそれはよ−)たくない。 アルミパイプ11からの拡管マンドレル12の引抜ぎが
完了すれば、パイプ1/lのシレフ1〜13への嵌合位
置を第1図のにうな関係とづることにより、]レット状
部材2 E5は:1イルスプリング30のばね力ににっ
て図示の姿勢に自動的に戻され、拡開部27は拡開しな
い状態に戻る。 アルミパイプ11が拡管されると、第2図の放熱フィン
47がアルミパイプ11に固着して熱交換用パイプ45
が形成される。熱交換用パイプ45はi・ランスファー
/I2にJ、って左側方に取出さ 10− れたの15、タフトノイード46によって図示(ノイf
いブレスベンダーに供給され、そこで湾曲されることに
よって第3図のにうな製品に形成される。 (発明の効果) 直線状のマンドレル(パイプ14)が拡管されるパイプ
11の内径にりも僅かに小さい外径を右し、マンドレル
の先頭部に放射方向に拡開可能なコレラ1〜状部祠25
を設け、]コレット状部材25にパイプ11からのマン
ドレル引抜き時に]レット状部材25を拡開しうる拡開
機構(例えばデーパ面21)を設けたので;簡単な構成
でコス1へ高になることがなく、しかもパイプが座屈を
起こす心配のないパイプ拡管装置を1qることができる
。 (別の実施例) (a)第1図のパイプ14の先端に]レフ1〜状部材2
5を固定する構成とすることもできる。この場合には拡
開部27の拡開程度を円筒面20とデーパ面21間の境
目ににって規制する必要は無くなり、シャフト13に対
するパイプ14の嵌合位置を変更することによって拡開
部27のテーパ面211− 1上の位置を適宜変更できる。従ってこの場合には、拡
管程度を容易に変更することが可能どなる。 (b)テーパ而21代えて、テーパ面210部分にピッ
チの大きなテーパねじを形成し、拡開部27の内周面に
はそれに対応り−る此1ねじのデーパねじを形成しても
よい。この場合にはシャツ1〜13とパイプ17Iどを
一体に形成して構成を簡素化することができる。 即ちアルミパイプ11内に拡管マンドレル12を挿入す
る場合には、]コレット状部材5が第1図の実線の位置
に配置される方向に拡管マンドレル12を回転ざUなが
ltら行なう。一方アルミバイブ11から拡管マンドレ
ル12を引抜く場合には、拡管マンドレル12を逆に回
転することにより、アルミパイプ11の内周面と拡開部
27の外周面間の摩擦及びテーパねじの作用ににつて拡
間部27を強制的に仮想線27aの位置に移動させ、拡
管を行なうことができる。 (C)本発明にJ:るパイプ拡管装置は、第2図のよう
な構造の熱交換用パイプ製造装置に採用される 12− 場合に限られることはt)・り、例えば冶具43がドラ
ムの外周面に複数個固定されたタイプの熱交換用バイブ
製造装置にも同様に採用することが可能である。 (d)1−記実施例(a) 、(b)では、引抜き時に
拡管を行なうか否かは任危に選択することが可能である
。従って例えばアルミパイプ11のうら放熱フィン47
の嵌合lノでいる部分では拡管を行ない、アルミパイプ
11を湾曲した場合に管壁が薄くなるa5それのある湾
曲箇所に対応づる部分では拡管を行なわない製造方法を
採用することもできる。 (e)拡管マンドレル12を引抜くどきに、二】レット
状部材25を回転さIることによって拡開部27の割溝
28により、アルミパイプ11の内周面に螺旋状の凹凸
を形成することもできる。これによって製品化されたア
ルミバイブ11内に冷媒等を通したどき、乱流が生じ易
くなって熱交換効率が向」ニリーる。 (f)更に別の実施例とし−C1第4図のような構成を
採用することもできる。第4図では、第1図に= 13
一 対応り”る箇所に同一の祠号が伺されでいる。第4図に
おいて、先頭部材18の1dtねじ19は直接にシャフ
ト13に螺着、ト−れており、又パイプ14(第1図)
が省略されてシャツ1〜13がアルミパイプ11の内径
と略同−に設定されている。又コイルスプリング30は
シャフト13と円筒部26どの間に縮設されており、コ
レット状部材25を常時[一方向に付勢している。なお
この場合は、コイルスプリング30のばね力は比較的弱
く設定されており、又段部31によってコレット状部材
25のF方向の摺動が規制されるようになっている。 アルミパイプ11に拡管マンドレル12を挿入する場合
には、コイルスプリング30に抗してコレラ1〜状部材
25を図示の状態に配置する。この状態は、コレット状
部月25のアルミパイプ11に対する摩擦によって自動
的に得られる。拡管マンドレル12を引抜く場合には、
コレット状部材25のアルミパイプ11に対する摩擦と
コイルスプリング30によつ−C1コレット状部材25
が先頭部材18に対して相対的にF方向に移動し、拡−
11″l − Ifl 1−る。 この場合−0第1図の実施例と同様の効果が得られる。 。
[] has been done. In the state shown in FIG. 1, the rear end of the cylindrical surface 20 and the front end of the vibrator 14 are located at the rear end of the reflex 1-shaped portion 4Δ25. A cylindrical portion 26 formed in the cylindrical portion 26 is slidably fitted therein, and the outer diameter of the cylindrical portion 26 is set to be the same as the outer diameter of the vibrator 14. The expanded portion 27 has an inner peripheral surface that is a tapered surface having the same inclination as the tapered surface 21, and has a plurality of grooves 28 spaced at equal intervals in the circumferential direction from the front end toward the rear cylindrical portion 26 in the longitudinal direction of the mandrel. A coil spring 30 is fitted into the leading member 18 between the expanded portion 27 and the hemispherical portion 15, and the coil spring 30 is formed on the rear end surface of the hemispherical portion 15. It is compressed between the stepped portion 31 and the front end of the expanded portion 27, and constantly pushes the cholera 1-shaped portion 25 in the direction f1. The mandrel drive device 35 shown in FIG. For example, four aluminum pipes 11 are arranged at intervals, and the aluminum pipes 11 are transported from the outside by a conveyor 37. A pipe rotation drive device 38 driven by a drive mechanism (not shown) is installed behind the aluminum pipe 11 on the base 36, and the pipe rotation drive device 38 rotates the rear end of the aluminum pipe 11 While elastically gripping the aluminum pipe 114 in the radial direction, the aluminum pipe 114 is rotated at a predetermined speed. At the rear of the pipe rotation drive device 38, the tube expansion mandrel 12 is arranged concentrically with the aluminum pipe 11 placed on the base 36. 5- A mandrel drive device Fr35 is installed. The tube expansion mandrel 12 is rotated at a predetermined speed by a mandrel drive device 35 driven by a drive mechanism (not shown), and the tube expansion mandrel 12 is rotated by the movement of the mandrel drive device 35 in the [direction]. It passes through the inside of the aluminum pipe 111 and fits into the aluminum pipe 111 so that it hangs there.A fin is cut and inserted in the front of the aluminum pipe 11 placed on the base 36 so as to extend the front part of the base 36. The fin cutting/inserting machine 40 has a built-in cutting device (not shown). The cutting device cuts the long plate-shaped fin original plate 41 supplied from the fin cutting/inserting machine 40 into a predetermined width, and the cutting timing can be set as appropriate. Note that the fin original plate 41 has an insertion hole 4 punched in advance using a fin punching press (not shown).
4 are formed in large numbers at predetermined levels. A transfer 42 is provided in a portion of the base 36 corresponding to the fin cutting/inserting machine 40, and a rectangular flat jig 43 is placed on -0-1 to transfer/12. On the upper surface of the jig 43, a large number of i\Ii 48 are provided at equal intervals in the left and right direction. In addition, 1-Lance Far/I2 can be moved with a pitch to draw a rectangle in one direction by holding the jig 43 on a horizontal plane with an arrow. A transfer portion 42a extending in the front-rear direction is hidden under the fin cutting/inserting machine 40.The heat exchange pipe/I5) assembled by the heat exchange pipe manufacturing apparatus shown in FIG. 1 to 46 to the side and supplied to a press bender (not shown). Explain the operation. In Figure 2, C1 conveyor 37
A set of four aluminum pipes 11, which have been conveyed in parallel and at equal intervals, are placed at the center of the upper surface of the base 36 in the front-back direction at intervals of 4η, as shown in the figure. Next, the pipe rotation drive device 38 grips the rear end of the aluminum pipe 11, and the tube expansion mandrel 12, which is rotationally driven by the mandrel drive device 35, passes through the pipe rotation drive device 38 and rotates into the aluminum pipe 11. Fit together. On the other hand, a long fin original plate 41 punched in advance into a predetermined shape
is supplied to a cutting tray installed in the fin cutter 1gi insertion machine 40 shown in FIG. In addition, a portion of non-snow 7 42 is transferred to -1 by transfer from 1 to Lansfur 42.
An empty jig /13 is placed in the EI J-, and the jig /13 is sent rearward under the fin cutting/inserting machine 40 by a predetermined pig by pitch feeding by the 1. During the cutting process in the fin cutting/inserting machine 40, the fin original plate 41 is cut into a predetermined size at predetermined time intervals.The formed heat dissipating fins 47 are inserted one by one into Wk1'IB of the jig 43 that passes below. I'm leaving. The heat dissipation fins 47 are formed by arranging a predetermined number of heat dissipation fins 47 at equal intervals so that one cock is formed in each block. is inserted into the groove 48. 1~ When the jig 43 is moved backward by the lance support part 42 a, the heat dissipating fins 47 are formed in advance! ,
:The insertion hole /I/l is fitted into the aluminum pipe 11 from the front end. At this point, in order to make the insertion work easier, the aluminum pipe 11 is connected to the pipe rotation drive device 38 by the pipe expansion mandrel 12. When all the heat dissipation fins 47 are completely fitted to the aluminum pipe 11,
Next, expand the pipe. J shown in FIG.
5 (Fig. 2) causes the pipe 14 to slide toward the shirts 1 to 13 in the direction of 1)1.
The roots 1 to 25 slide forward. As a result, the expanding portion 27 moves forward on the tapered surface 21 of the leading member 18 and is forcibly expanded toward the outer circumference.
In the state shown by the imaginary line 27a in the figure), the aluminum pipe 11 is expanded from the inside to a predetermined diameter by the expansion part 27. The sliding movement is constant by being restricted at the boundary 11'c between the cylindrical portion 20 and the 1-part surface 21. -〇- When the expansion part 27 is expanded and the state is 1, is the cloak 1 nor drive device? f 3 F) (Fig. 2) is moved to the rear part 1lIIJη, and the tube expansion mandrel 12 is integrally moved to the rear part 27, and the tube expansion mandrel 12 is moved to the rear part 27 while expanding the real pipe 11. It is pulled out from the aluminum pie 111. At this time, rotate the tube expansion mandrel 12! This makes it easier to handle the items while handling them. Matako Togi Pipe 1
/I supports the aluminum pipe 11 from the inner circumferential side, so
I don't want the aluminum pipe 11 to buckle. When the expansion mandrel 12 has been pulled out from the aluminum pipe 11, the fitting position of the pipe 1/l to the shafts 1 to 13 is expressed as shown in FIG. 1, and the let-shaped member 2 E5 is :1 The spring force of the spring 30 automatically returns the position shown in the figure, and the expanding portion 27 returns to its unexpanded state. When the aluminum pipe 11 is expanded, the heat radiation fins 47 shown in FIG. 2 are fixed to the aluminum pipe 11 and the heat exchange pipe 45
is formed. The heat exchange pipe 45 is taken out to the left side of I/Lancefer/I2.
The material is fed to a breath bender, where it is bent to form the product shown in FIG. (Effects of the Invention) A straight mandrel (pipe 14) has an outer diameter slightly smaller than the inner diameter of the pipe 11 to be expanded, and a cholera-shaped part that can be expanded in the radial direction is formed at the top of the mandrel. Shrine 25
Since the collet-shaped member 25 is provided with an expansion mechanism (for example, the tapered surface 21) that can expand the collet-shaped member 25 when the mandrel is pulled out from the pipe 11; the cost can be increased to 1 with a simple configuration. It is possible to provide a pipe expansion device of 1 q without the risk of pipe buckling. (Another embodiment) (a) At the tip of the pipe 14 in FIG. 1] Ref 1 - shaped member 2
5 may be fixed. In this case, it is no longer necessary to restrict the degree of expansion of the expanding portion 27 at the boundary between the cylindrical surface 20 and the tapered surface 21, and by changing the fitting position of the pipe 14 with respect to the shaft 13, the expanding portion 27 on the tapered surface 211-1 can be changed as appropriate. Therefore, in this case, it becomes possible to easily change the degree of tube expansion. (b) Instead of the taper 21, a tapered thread with a large pitch may be formed on the tapered surface 210 portion, and a corresponding taper thread with a single thread may be formed on the inner peripheral surface of the expanded portion 27. . In this case, the structure can be simplified by integrally forming the shirts 1 to 13 and the pipe 17I. That is, when inserting the tube expanding mandrel 12 into the aluminum pipe 11, the tube expanding mandrel 12 is rotated in a direction such that the collet-like member 5 is placed at the position shown by the solid line in FIG. On the other hand, when pulling out the tube expansion mandrel 12 from the aluminum vibrator 11, by rotating the tube expansion mandrel 12 in the opposite direction, the friction between the inner circumferential surface of the aluminum pipe 11 and the outer circumferential surface of the expanded portion 27 and the action of the tapered screw can be reduced. The expanded portion 27 can be forcibly moved to the position of the imaginary line 27a to perform pipe expansion. (C) The pipe expansion device according to the present invention is employed in a heat exchange pipe manufacturing device having a structure as shown in FIG. It is also possible to similarly adopt a type of heat exchanger vibe manufacturing device in which a plurality of heat exchanger vibes are fixed to the outer peripheral surface of the heat exchanger. (d) In the embodiments (a) and (b), it is possible to arbitrarily select whether or not to expand the tube at the time of extraction. Therefore, for example, the heat radiation fin 47 on the back of the aluminum pipe 11
It is also possible to adopt a manufacturing method in which the tube is expanded at the fitting portion, but not expanded at the portion corresponding to the curved portion where the tube wall becomes thinner when the aluminum pipe 11 is bent. (e) When pulling out the tube expansion mandrel 12, by rotating the let-shaped member 25, a spiral unevenness is formed on the inner circumferential surface of the aluminum pipe 11 by the split groove 28 of the expansion part 27. You can also do it. As a result, when a refrigerant or the like is passed through the manufactured aluminum vibe 11, turbulence is likely to occur, and the heat exchange efficiency is improved. (f) As yet another embodiment, a configuration as shown in FIG. 4 of C1 can be adopted. In Figure 4, = 13 in Figure 1
The same shrine name is found in corresponding places. In Fig. 4, the 1dt screw 19 of the leading member 18 is directly screwed into the shaft 13, and the pipe 14 (the first figure)
is omitted, and the inner diameters of the shirts 1 to 13 are set to be approximately the same as the inner diameter of the aluminum pipe 11. Further, the coil spring 30 is compressed between the shaft 13 and the cylindrical portion 26, and always biases the collet-shaped member 25 in one direction. In this case, the spring force of the coil spring 30 is set to be relatively weak, and the step portion 31 restricts the collet-shaped member 25 from sliding in the F direction. When inserting the tube expansion mandrel 12 into the aluminum pipe 11, the cholera 1 to 25 members are placed in the illustrated state against the coil spring 30. This state is automatically obtained by the friction of the collet-shaped portion 25 against the aluminum pipe 11. When pulling out the tube expansion mandrel 12,
Due to the friction of the collet-shaped member 25 against the aluminum pipe 11 and the coil spring 30 - C1 collet-shaped member 25
moves in the F direction relative to the leading member 18 and expands.
11"l - Ifl 1-l. In this case, the same effect as the embodiment of -0 Fig. 1 can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明にJ、るバー(7’拡管装V゛1゛の紺
rθi面部分図、第2図は本発明にJ:るバイブ拡管裂
開を採用した熱交換用パイプ製j告装置の斜視略図、第
3図は成形されlこ熱交換用パイプの斜視1’!4図、
第4図は別のす流側の第1図に相当りる図C′ある。 11・・・パイプ、14・・・パイプ(マンドレルの一
=・部)、21・・・デーパ面(拡開機構の−・例)、
2!′)・・・−]レッI−状部祠 4’l *r出願人 日本アルミニウムr業株式会ネ1
15− 第1図 第S図
Fig. 1 is a partial view of the dark blue rθi side of the bar (7' tube expansion device V゛1゛) according to the present invention, and Fig. 2 is a partial view of the bar (7' tube expansion device V゛1゛) in the dark blue rθi plane. Figure 3 is a schematic perspective view of the notification device; Figure 3 is a perspective view of the molded heat exchange pipe;
FIG. 4 is a view C' corresponding to FIG. 1 on another stream side. 11... Pipe, 14... Pipe (one part of mandrel), 21... Taper surface (example of expansion mechanism),
2! ')...-]Re I-shaped part shrine 4'l *r Applicant Nippon Aluminum R Industry Co., Ltd. Ne1
15- Figure 1 Figure S

Claims (1)

【特許請求の範囲】 直線状のマンドレルが拡管されるパイプの内径J:りも
僅かに小さい外径を右し、マンドレルの先頭部に放射方
向に拡開可能な]レフ1〜状部材を設【ノ、コレット状
部月内にパイプが1うのマンドレル引抜き時にコレラ1
〜状部材を拡開しうる拡開機構を設置ノたことを特徴と
するパイプ拡管装置。
[Claims] A linear mandrel is expanded with a slightly smaller outer diameter (J) of the pipe into which the pipe is expanded, and a reflex 1-shaped member that is expandable in the radial direction is provided at the top of the mandrel. [No. Cholera 1 when pulling out a mandrel with a pipe in the collet-shaped part.
A pipe expansion device characterized by installing an expansion mechanism capable of expanding a ~-shaped member.
JP9437484A 1984-05-10 1984-05-10 Pipe expander Pending JPS60238046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9437484A JPS60238046A (en) 1984-05-10 1984-05-10 Pipe expander

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9437484A JPS60238046A (en) 1984-05-10 1984-05-10 Pipe expander

Publications (1)

Publication Number Publication Date
JPS60238046A true JPS60238046A (en) 1985-11-26

Family

ID=14108540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9437484A Pending JPS60238046A (en) 1984-05-10 1984-05-10 Pipe expander

Country Status (1)

Country Link
JP (1) JPS60238046A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4916316A (en) * 1986-04-20 1990-04-10 Fuji Photo Film Co., Ltd. Radiation image recording and reproducing method
EP1803526A1 (en) 2005-12-28 2007-07-04 Fatigue Technology, Inc. Mandrel assembly and method of using the same
US7926318B2 (en) 2006-04-27 2011-04-19 Fatigue Technology, Inc. Alignment device and methods of using the same
US7946628B2 (en) 2003-07-31 2011-05-24 Fatigue Technology, Inc. Tubular metal fitting expandable in a wall opening and method of installation
US7958766B2 (en) 2006-06-29 2011-06-14 Fatigue Technology, Inc. Self-aligning tools and a mandrel with retention sleeve
US8069699B2 (en) 2006-08-28 2011-12-06 Fatigue Technology, Inc. Installation/processing systems and methods of using the same
US8312606B2 (en) 2007-10-16 2012-11-20 Fatigue Technology, Inc. Expandable fastener assembly with deformed collar
US8938886B2 (en) 2012-01-30 2015-01-27 Fatigue Technology, Inc. Smart installation/processing systems, components, and methods of operating the same
US9114449B2 (en) 2011-06-15 2015-08-25 Fatigue Technology, Inc. Modular nut plates with closed nut assemblies
US10010983B2 (en) 2008-03-07 2018-07-03 Fatigue Technology, Inc. Expandable member with wave inhibitor and methods of using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216866A (en) * 1975-07-31 1977-02-08 Nissan Chem Ind Ltd Method of lowering cod in drainage
JPS53129154A (en) * 1977-04-18 1978-11-10 Nippon Kokan Kk <Nkk> Manufacture of large diameter thick steel tube
JPS5666338A (en) * 1979-11-05 1981-06-04 Isao Gokyu Manufacture and tool for tapered thin walled can drum

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216866A (en) * 1975-07-31 1977-02-08 Nissan Chem Ind Ltd Method of lowering cod in drainage
JPS53129154A (en) * 1977-04-18 1978-11-10 Nippon Kokan Kk <Nkk> Manufacture of large diameter thick steel tube
JPS5666338A (en) * 1979-11-05 1981-06-04 Isao Gokyu Manufacture and tool for tapered thin walled can drum

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4916316A (en) * 1986-04-20 1990-04-10 Fuji Photo Film Co., Ltd. Radiation image recording and reproducing method
US7946628B2 (en) 2003-07-31 2011-05-24 Fatigue Technology, Inc. Tubular metal fitting expandable in a wall opening and method of installation
EP3199292A1 (en) * 2005-12-28 2017-08-02 Fatigue Technology, Inc. Mandrel assembly and method of using the same
EP1803526A1 (en) 2005-12-28 2007-07-04 Fatigue Technology, Inc. Mandrel assembly and method of using the same
US7509829B2 (en) 2005-12-28 2009-03-31 Fatigue Technology, Inc. Mandrel assembly and method of using the same
US7926319B2 (en) 2005-12-28 2011-04-19 Fatigue Technology, Inc. Mandrel assembly and method of using the same
US8353193B2 (en) 2005-12-28 2013-01-15 Fatigue Technology, Inc. Mandrel assembly and method of using the same
US8191395B2 (en) 2006-04-27 2012-06-05 Fatigue Technology, Inc. Alignment device and methods of using the same
US7926318B2 (en) 2006-04-27 2011-04-19 Fatigue Technology, Inc. Alignment device and methods of using the same
US8387436B2 (en) 2006-04-27 2013-03-05 Fatigue Technology, Inc. Alignment device and methods of using the same
US8061178B2 (en) 2006-06-29 2011-11-22 Fatigue Technology, Inc. Self-aligning tools and seating assemblies
US7958766B2 (en) 2006-06-29 2011-06-14 Fatigue Technology, Inc. Self-aligning tools and a mandrel with retention sleeve
US8069699B2 (en) 2006-08-28 2011-12-06 Fatigue Technology, Inc. Installation/processing systems and methods of using the same
US8402806B2 (en) 2006-08-28 2013-03-26 Fatigue Technology, Inc. Installation/processing systems and methods of using the same
US8312606B2 (en) 2007-10-16 2012-11-20 Fatigue Technology, Inc. Expandable fastener assembly with deformed collar
US10010983B2 (en) 2008-03-07 2018-07-03 Fatigue Technology, Inc. Expandable member with wave inhibitor and methods of using the same
US9114449B2 (en) 2011-06-15 2015-08-25 Fatigue Technology, Inc. Modular nut plates with closed nut assemblies
US8938886B2 (en) 2012-01-30 2015-01-27 Fatigue Technology, Inc. Smart installation/processing systems, components, and methods of operating the same
US10130985B2 (en) 2012-01-30 2018-11-20 Fatigue Technology, Inc. Smart installation/processing systems, components, and methods of operating the same
US10843250B2 (en) 2012-01-30 2020-11-24 Fatigue Technology, Inc. Smart installation/processing systems, components, and methods of operating the same

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