JP2000117362A - Mandrel for expanding metallic tube, and expanding method - Google Patents
Mandrel for expanding metallic tube, and expanding methodInfo
- Publication number
- JP2000117362A JP2000117362A JP10289254A JP28925498A JP2000117362A JP 2000117362 A JP2000117362 A JP 2000117362A JP 10289254 A JP10289254 A JP 10289254A JP 28925498 A JP28925498 A JP 28925498A JP 2000117362 A JP2000117362 A JP 2000117362A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- expanding
- metal
- outer circumferential
- pipe
- 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.)
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- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属管の拡管用マ
ンドレル及び拡管方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mandrel and a method for expanding a metal pipe.
【０００２】[0002]
【従来の技術】金属管を接続するとき、その金属管の端
部を予め拡管してから接続する方法が用いられている。
例えば、空調機用熱交換器の主熱交換管として用いられ
ている銅製平滑管や銅製内面フィン付金属管の接続作業
では、まずその銅製平滑管や銅製内面フィン付金属管の
一方側端部或いは両端部をベスマルク状に拡管し、次
に、この拡管部にリターンベンド管の端部を内挿し、然
る後この内挿部に熱溶融ろう材を流し込みシール接続す
る。2. Description of the Related Art When connecting a metal tube, a method is used in which the end of the metal tube is expanded in advance and then connected.
For example, in the connection work of a copper smooth tube or a copper inner finned metal tube used as a main heat exchange tube of an air conditioner heat exchanger, first, one end of the copper smooth inner tube or a copper inner finned metal tube is connected. Alternatively, both ends are expanded in a Vesmark shape, and then the end of the return bend pipe is inserted into the expanded portion, and then a hot-melt brazing material is poured into the inserted portion and connected by sealing.
【０００３】図３は、従来の金属管の拡管方法を示した
一部断面正面説明図である。FIG. 3 is a partially sectional front view showing a conventional method for expanding a metal pipe.
【０００４】図３において１は拡管用マンドレル、２は
拡管用マンドレル最大外径、３は金属管、４は金属管最
内側内径、５はロッド、６は金属プレート、７はフィン
である。In FIG. 3, reference numeral 1 denotes a pipe expansion mandrel, 2 denotes a maximum outer diameter of the pipe expansion mandrel, 3 denotes a metal pipe, 4 denotes an innermost inner diameter of the metal pipe, 5 denotes a rod, 6 denotes a metal plate, and 7 denotes a fin.
【０００５】ここにおいて拡管用マンドレル１は形状が
球状或いは砲弾状であって、その後端にはロッド５が一
体的に固定されている。そして拡管用マンドレル最大外
径２は金属管最内側内径４より大きいようになってい
る。Here, the expanding mandrel 1 has a spherical or shell-like shape, and a rod 5 is integrally fixed to the rear end thereof. And the maximum outer diameter 2 of the mandrel for pipe expansion is larger than the innermost inner diameter 4 of the metal pipe.
【０００６】また、この拡管に例示した金属管３は図４
に示すような銅製内面フィン付金属管である。以下、金
属管３は銅製内面フィン付金属管３とする。[0006] The metal tube 3 exemplified in this expansion is shown in FIG.
This is a metal tube with a copper inner fin as shown in FIG. Hereinafter, the metal tube 3 is a metal tube 3 with a copper inner fin.
【０００７】即ち、従来の金属管の拡管方法は、まず孔
を有するように構成された複数の金属プレート６群を用
意し、次に、その複数の金属プレート６群の孔内に拡管
すべき銅製内面フィン付金属管３を挿通させる。That is, in the conventional method of expanding a metal pipe, first, a plurality of metal plates 6 having a hole are prepared, and then the metal plates are to be expanded in the holes of the plurality of metal plates 6. The metal tube 3 with copper inner fins is inserted.
【０００８】次に、拡管用マンドレル１の外周に潤滑油
を塗布する。Next, lubricating oil is applied to the outer circumference of the pipe expanding mandrel 1.
【０００９】次に、その複数の金属プレート６群の孔内
に挿通した銅製内面フィン付金属管３の端部に拡管用マ
ンドレル１の先端を挿入し、それからロッド５を押し込
むことにより銅製内面フィン付金属管３の端部を拡径
し、それにより銅製内面フィン付金属管３の外周と金属
プレート６群の孔の内周とは密着するようになる。Next, the tip of the expansion mandrel 1 is inserted into the end of the metal tube 3 with copper internal fins inserted into the holes of the plurality of metal plates 6 and the rod 5 is pushed into the copper internal fins. The diameter of the end of the metal tube 3 is enlarged, so that the outer circumference of the metal tube 3 with internal fins made of copper and the inner circumference of the hole of the group of metal plates 6 come into close contact with each other.
【００１０】図５は、このような従来の金属管の拡管方
法により銅製内面フィン付金属管３の端部を拡管したと
きにおける部分拡大断面図を示したものである。FIG. 5 is a partially enlarged cross-sectional view when the end of the copper tube 3 with internal fins is expanded by such a conventional method for expanding a metal tube.
【００１１】図５において１は拡管用マンドレル、３は
銅製内面フィン付金属管、７はフィン、９は潤滑油であ
る。In FIG. 5, reference numeral 1 denotes a pipe expansion mandrel, 3 denotes a metal pipe having a copper inner fin, 7 denotes a fin, and 9 denotes a lubricating oil.
【００１２】[0012]
【発明が解決しようとする課題】しかし、図５に示した
ように従来の金属管の拡管方法により銅製内面フィン付
金属管３の端部を拡管したときには、潤滑油９が銅製内
面フィン付金属管３のフィン７とフィン７との谷部に逃
げてしまい、その結果、本来潤滑油が必要な箇所のフィ
ン７頭部には潤滑油９膜が十分に形成されない。このた
め拡管用マンドレル１の外周面と銅製内面フィン付金属
管３のフィン７頭部との摩擦力が大きくなり、その結
果、フィン７が倒されたり、折り曲げられたり、破損し
たり、又は拡管用マンドレル１の外周面に金属の焼き付
け層ができたりするといったトラブルが発生することが
あった。However, as shown in FIG. 5, when the end portion of the metal tube 3 with internal fins made of copper is expanded by the conventional method of expanding a metal tube, the lubricating oil 9 is filled with the metal with internal fins made of copper. As a result, the lubricating oil 9 is not sufficiently formed on the head of the fin 7 where lubricating oil is originally required. For this reason, the frictional force between the outer peripheral surface of the tube expanding mandrel 1 and the head of the fin 7 of the metal tube 3 with the copper inner fin is increased, and as a result, the fins 7 are collapsed, bent, broken, or expanded. In some cases, troubles such as formation of a baked metal layer on the outer peripheral surface of the mandrel 1 may occur.
【００１３】本発明はかかる点に立って為されたもので
あって、その目的とするところは前記した従来技術の欠
点を解消し、内面フィン付金属管の端部内を拡管用マン
ドレルにより拡管作業したときに、拡管用マンドレルの
外周面と内面フィン付金属管のフィン頭部との摩擦力を
顕著に低減でき、その結果、高品質の端部拡管金属管が
得られる金属管の拡管用マンドレル及び拡管方法を提供
することにある。The present invention has been made in view of such a point, and an object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to expand the inside of an end portion of a metal pipe with internal fins by a pipe expanding mandrel. In this case, the frictional force between the outer peripheral surface of the expansion pipe mandrel and the fin head of the metal pipe with internal fins can be significantly reduced, and as a result, a high quality end expansion metal pipe can be obtained. And a pipe expansion method.
【００１４】[0014]
【課題を解決するための手段】本発明の要旨とするとこ
ろは、次の２点にある。The gist of the present invention lies in the following two points.
【００１５】（１）形状が球状或いは砲弾状体から成
り、且つその後端にロッドが一体的に固定されて成る金
属管の拡管用マンドレルにおいて、該拡管用マンドレル
の外周上には円周方向に刻まれた潤滑油溜め用外周溝が
設けられていることを特徴とする金属管の拡管用マンド
レル。(1) In a mandrel for expanding a metal tube having a spherical or shell-like shape and having a rod integrally fixed at the rear end thereof, the mandrel for expanding a metal tube is provided on the outer periphery of the mandrel in a circumferential direction. An expanded mandrel for metal pipes, characterized by being provided with a carved outer peripheral groove for a lubricating oil reservoir.
【００１６】（２）孔を有する複数の金属プレート群の
前記孔内に拡管しようとする金属管の端部を挿通した
後、該挿通した金属管の端部内に潤滑油を塗布した拡管
用マンドレルを押し込んで拡管する金属管の拡管方法に
おいて、前記拡管用マンドレルとして外周上に円周方向
に刻まれた潤滑油溜め用外周溝が設けられている外周溝
付拡管用マンドレルを用いることを特徴とする金属管の
拡管方法。(2) An expansion mandrel in which the end of a metal pipe to be expanded is inserted into the hole of a plurality of metal plates having holes, and a lubricating oil is applied to the end of the inserted metal pipe. In the method for expanding a metal pipe which is expanded by pushing in, a pipe-filling mandrel having an outer circumferential groove provided with a lubricating oil reservoir outer circumferential groove engraved in the circumferential direction on the outer circumference is used as the expanding mandrel. To expand metal pipes.
【００１７】本発明において外周溝は、拡管しようとす
る金属管の内径よりも大きな外径を有する拡管用マンド
レルの外周上に少なくとも１本以上設けることが好まし
い。また、本発明において外周溝の位置は、拡管用マン
ドレルを内面フィン付金属管の端部内に差し込んだとき
その内面フィン付金属管のフィン頭部と最初に接触する
位置の外周に設けられた第１外周溝と、拡管用マンドレ
ルの中間位置の外周に設けられた第２外周溝とから成る
ことが好ましい。In the present invention, it is preferable that at least one outer circumferential groove is provided on the outer circumference of the expanding mandrel having an outer diameter larger than the inner diameter of the metal pipe to be expanded. Further, in the present invention, the position of the outer peripheral groove is the first outer peripheral groove provided at the position where it comes into first contact with the fin head of the inner finned metal tube when the expanding mandrel is inserted into the end of the inner finned metal tube. It is preferable to include one outer circumferential groove and a second outer circumferential groove provided on the outer circumference at an intermediate position of the pipe expanding mandrel.
【００１８】[0018]
【発明の実施の形態】次に、本発明の金属管の拡管用マ
ンドレル及び拡管方法を図面により説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mandrel for expanding a metal pipe according to the present invention and a method for expanding the pipe will be described below with reference to the drawings.
【００１９】（本発明の金属管の拡管用マンドレルの一
実施例）図１は、本発明の金属管の拡管用マンドレルの
一実施例を示した拡大正面図である。(One Embodiment of Mandrel for Expanding Metal Tube of the Present Invention) FIG. 1 is an enlarged front view showing one embodiment of a mandrel for expanding a metal tube of the present invention.
【００２０】図１において５はロッド、１１は外周溝付
拡管用マンドレル、１２は第１外周溝、１３は第２外周
溝である。In FIG. 1, 5 is a rod, 11 is a mandrel for pipe expansion with an outer circumferential groove, 12 is a first outer circumferential groove, and 13 is a second outer circumferential groove.
【００２１】即ち、本発明の一実施例の金属管の拡管用
マンドレルは外周面に第１外周溝１２及び第２外周溝１
３を設けることが特徴である。That is, the mandrel for expanding a metal pipe according to one embodiment of the present invention has a first outer peripheral groove 12 and a second outer peripheral groove 1 on the outer peripheral surface.
3 is provided.
【００２２】ここにおいて外周面に設ける外周溝の開口
部、深さ等は用いる潤滑油の粘度により適宜決定する。
例えば、粘度が低い潤滑油を用いるときには開口部を狭
くし、逆に粘度が高い潤滑油を用いるときには開口部を
広くする。Here, the opening, depth and the like of the outer peripheral groove provided on the outer peripheral surface are appropriately determined depending on the viscosity of the lubricating oil used.
For example, when a lubricating oil having a low viscosity is used, the opening is narrowed, and when a lubricating oil having a high viscosity is used, the opening is widened.
【００２３】また、本発明において外周溝は１本でも複
数本でもよいが、少なくともその刻む位置は、拡管しよ
うとする金属管の内径よりも大きな外径部分である外周
溝付拡管用マンドレル１１の外周上である。In the present invention, one or a plurality of outer circumferential grooves may be provided, but at least the cutout position of the outer circumferential groove is larger than that of the metal pipe to be expanded. On the outer circumference.
【００２４】この本発明の一実施例では第１外周溝１２
の刻む位置は、外周溝付拡管用マンドレル１１を内面フ
ィン付金属管３の端部内に挿入したときに内面フィン付
金属管３のフィン７頭部との接触開始位置である。In one embodiment of the present invention, the first outer peripheral groove 12
Is a contact start position of the metal tube 3 with the internal fins when the mandrel 11 for expanding the outer peripheral groove is inserted into the end of the metal tube 3 with the internal fins.
【００２５】また、この本発明の一実施例では第２外周
溝１３の刻む位置は、外周溝付拡管用マンドレル１１の
中間位置である。Further, in the embodiment of the present invention, the position where the second outer peripheral groove 13 is cut is an intermediate position of the pipe expanding mandrel 11 with the outer peripheral groove.
【００２６】このように構成して成る本発明の一実施例
の金属管の拡管用マンドレルは、内面フィン付金属管３
の端部内に挿入したときに内面フィン付金属管３のフィ
ン７頭部との接触開始位置に第１外周溝１２が刻まれて
おり、更に内面フィン付金属管３の端部内に挿入したと
きに内面フィン付金属管３の端部拡管範囲の中間位置に
第２外周溝１３が刻まれているので、それらの第１外周
溝１２及び第２外周溝１３内に潤滑油９を溜めることが
できる。従って、本発明の一実施例の金属管の拡管用マ
ンドレルを内面フィン付金属管３の端部内に押し込んで
拡管したときには油切れを起こすことがなく、その結
果、拡管用マンドレルの外周面と内面フィン付金属管の
フィン頭部との摩擦力を顕著に低減でき、それにより高
品質の端部拡管内面フィン付金属管を得ることができ
る。The metal pipe expanding mandrel according to one embodiment of the present invention having the above-described structure is a metal pipe 3 with an inner fin.
The first outer peripheral groove 12 is formed at the position where the inner finned metal tube 3 starts contacting with the fin 7 head when inserted into the end of the inner finned metal tube 3, and further inserted into the end of the inner finned metal tube 3. Since the second outer peripheral groove 13 is cut at an intermediate position of the end expansion range of the metal tube 3 with the inner surface fin, the lubricating oil 9 can be stored in the first outer peripheral groove 12 and the second outer peripheral groove 13. it can. Therefore, when the mandrel for expanding a metal pipe according to one embodiment of the present invention is pushed into the end of the metal pipe 3 with an inner fin and expanded, no oil shortage occurs. As a result, the outer peripheral surface and the inner surface of the mandrel for expanding a pipe are reduced. The frictional force between the finned metal tube and the fin head can be remarkably reduced, so that a high-quality metal tube with end-finished inner surface fins can be obtained.
【００２７】（本発明の金属管の拡管方法の一実施例）
次に、本発明の金属管の拡管方法の一実施例について説
明する。(One Embodiment of the Metal Pipe Expansion Method of the Present Invention)
Next, an embodiment of the metal pipe expanding method of the present invention will be described.
【００２８】本発明の金属管の拡管方法の一実施例で
は、拡管用マンドレルとして図１に示す外周溝付拡管用
マンドレル１１を用いることを特徴とする。One embodiment of the method for expanding a metal pipe according to the present invention is characterized in that the expansion mandrel 11 with an outer circumferential groove shown in FIG. 1 is used as the expansion mandrel.
【００２９】図２は、本発明の金属管の拡管方法の一実
施例を示した部分拡大断面図である。FIG. 2 is a partially enlarged sectional view showing one embodiment of the metal pipe expanding method of the present invention.
【００３０】図２において１１は外周溝付拡管用マンド
レル、１２は第１外周溝、１３は第２外周溝、７１は第
１フィン、７２は第２フィン、７３は第３フィン、９１
は第１外周溝内の潤滑油、９２は第２外周溝内の潤滑油
である。In FIG. 2, reference numeral 11 denotes a pipe expanding mandrel with an outer peripheral groove, 12 denotes a first outer peripheral groove, 13 denotes a second outer peripheral groove, 71 denotes a first fin, 72 denotes a second fin, 73 denotes a third fin, and 91 denotes a first fin.
Is a lubricating oil in the first outer peripheral groove, and 92 is a lubricating oil in the second outer peripheral groove.
【００３１】即ち、本発明の金属管の拡管方法の一実施
例では、まず孔を有するように構成された複数の金属プ
レート６群を用意し、次に、その複数の金属プレート６
群の孔内に拡管すべき銅製内面フィン付金属管３を挿通
させる。That is, in one embodiment of the metal pipe expanding method of the present invention, first, a group of a plurality of metal plates 6 having holes is prepared, and then the plurality of metal plates 6 are formed.
A copper inner finned metal tube 3 to be expanded is inserted into the hole of the group.
【００３２】次に、外周溝付拡管用マンドレル１１の外
周上に潤滑油を塗布すると共に第１外周溝１２内及び第
２外周溝１３内にも潤滑油９を溜めるようにする。Next, lubricating oil is applied on the outer circumference of the pipe-expanding mandrel 11 with the outer peripheral groove, and the lubricating oil 9 is also stored in the first outer peripheral groove 12 and the second outer peripheral groove 13.
【００３３】次に、その複数の金属プレート６群の孔内
に挿通した銅製内面フィン付金属管３の端部内に外周溝
付拡管用マンドレル１１の先端を差し込み、それから図
示しないロッド５を押し込むことにより銅製内面フィン
付金属管３の端部を拡管する。Next, the tip of the pipe-expanding mandrel 11 with the outer peripheral groove is inserted into the end of the metal pipe 3 with the inner fins made of copper inserted into the holes of the plurality of metal plates 6, and then the rod 5 (not shown) is pushed. With this, the end of the metal tube 3 with copper inner fins is expanded.
【００３４】このように銅製内面フィン付金属管３の端
部を拡管するとき、まず銅製内面フィン付金属管３の第
１フィン７１は第１外周溝１２内に溜まっている潤滑油
９１に触れて潤滑されてから外周溝付拡管用マンドレル
１１と接触する。既に外周溝付拡管用マンドレル１１と
接触している第２フィン７２は潤滑油の油膜が次第に薄
くなるが、やがて第２外周溝１３内に溜まっている潤滑
油９２に触れて再び十分なる潤滑を受け、それから外周
溝付拡管用マンドレル１１と接触する。以下、同様な現
象が続くので、油切れを起こすことがなく、その結果、
拡管用マンドレルの外周面と内面フィン付金属管のフィ
ン頭部との摩擦力を顕著に低減でき、それにより高品質
の端部拡管内面フィン付金属管を得ることができる。When the end of the metal tube 3 with copper internal fins is expanded in this way, first, the first fin 71 of the metal tube 3 with copper internal fins contacts the lubricating oil 91 accumulated in the first outer peripheral groove 12. After being lubricated, it comes into contact with the outer circumferential grooved pipe expanding mandrel 11. The lubricating oil film of the second fin 72 already in contact with the pipe-expanding mandrel 11 with the outer peripheral groove is gradually thinned, but eventually the lubricating oil 92 accumulated in the second outer peripheral groove 13 is touched to provide sufficient lubrication again. And then comes into contact with the outer grooved expansion mandrel 11. Hereinafter, the same phenomenon continues, so that the oil does not run out, and as a result,
The frictional force between the outer peripheral surface of the pipe expanding mandrel and the fin head of the metal pipe with internal fins can be remarkably reduced, whereby a high-quality metal pipe with internal fins with end expansion can be obtained.
【００３５】[0035]
【発明の効果】本発明の金属管の拡管用マンドレル及び
拡管方法によれば、拡管したときにおける拡管用マンド
レルの外周面と内面フィン付金属管のフィン頭部との摩
擦力を顕著に低減でき、それにより高品質の端部拡管内
面フィン付金属管を得ることができるものであり、工業
上有用である。According to the metal pipe expanding mandrel and the pipe expanding method of the present invention, the frictional force between the outer peripheral surface of the pipe expanding mandrel and the fin head of the metal pipe with internal fins when expanded can be significantly reduced. Thereby, a high-quality metal pipe with end fins having inner end fins can be obtained, which is industrially useful.
【図１】本発明の金属管の拡管用マンドレルの一実施例
を示した拡大正面図である。FIG. 1 is an enlarged front view showing an embodiment of a mandrel for expanding a metal pipe according to the present invention.
【図２】本発明の金属管の拡管方法の一実施例を示した
部分拡大断面図である。FIG. 2 is a partially enlarged sectional view showing one embodiment of a method for expanding a metal pipe according to the present invention.
【図３】従来の金属管の拡管方法を示した一部断面正面
説明図である。FIG. 3 is a partially sectional front view showing a conventional method for expanding a metal pipe.
【図４】従来の銅製内面フィン付金属管の断面図であ
る。FIG. 4 is a cross-sectional view of a conventional metal tube with a copper inner fin.
【図５】従来の金属管の拡管方法により銅製内面フィン
付金属管３の端部を拡管したときにおける部分拡大断面
図を示したものである。FIG. 5 is a partially enlarged cross-sectional view when an end portion of a metal pipe 3 with a copper inner fin is expanded by a conventional metal pipe expansion method.
１ 拡管用マンドレル ２ 拡管用マンドレル最大外径 ３ 金属管 ４ 金属管最内側内径 ５ ロッド ６ 金属プレート ７ フィン ９ 潤滑油 １１ 外周溝付拡管用マンドレル １２ 第１外周溝 １３ 第２外周溝 ７１ 第１フィン ７２ 第２フィン ７３ 第３フィン ９１ 第１外周溝内の潤滑油 ９２ 第２外周溝内の潤滑油 REFERENCE SIGNS LIST 1 pipe expansion mandrel 2 pipe expansion mandrel maximum outer diameter 3 metal pipe 4 metal pipe innermost inner diameter 5 rod 6 metal plate 7 fin 9 lubricating oil 11 pipe expansion mandrel with outer peripheral groove 12 first outer peripheral groove 13 second outer peripheral groove 71 first Fin 72 Second fin 73 Third fin 91 Lubricating oil in first outer peripheral groove 92 Lubricating oil in second outer peripheral groove
Claims (4)
その後端にロッドが一体的に固定されて成る金属管の拡
管用マンドレルにおいて、該拡管用マンドレルの外周上
には円周方向に刻まれた潤滑油溜め用外周溝が設けられ
ていることを特徴とする金属管の拡管用マンドレル。1. A mandrel for expanding a metal tube having a spherical or shell-like shape and having a rod integrally fixed at a rear end thereof, said mandrel being engraved in a circumferential direction on an outer periphery of said mandrel. A mandrel for expanding a metal pipe, wherein a peripheral groove for a lubricating oil reservoir is provided.
よりも大きな外径を有する拡管用マンドレルの外周上に
少なくとも１本以上設けられたものであることを特徴と
する請求項１記載の金属管の拡管用マンドレル。2. The pipe according to claim 1, wherein at least one outer circumferential groove is provided on the outer circumference of an expanding mandrel having an outer diameter larger than the inner diameter of the metal pipe to be expanded. Mandrel for expanding metal pipes.
付金属管の端部内に差し込んだとき該内面フィン付金属
管のフィン頭部と最初に接触する位置の外周に設けられ
た第１外周溝と、前記拡管用マンドレルの中間位置の外
周に設けられた第２外周溝とから成ることを特徴とする
請求項１記載の金属管の拡管用マンドレル。3. A first outer periphery provided at an outer periphery at a position where the outer peripheral groove first comes into contact with a fin head of the inner finned metal tube when the expanding mandrel is inserted into an end of the inner finned metal tube. 2. The mandrel for expanding a metal pipe according to claim 1, comprising a groove and a second outer peripheral groove provided on an outer periphery of an intermediate position of the expanding mandrel.
内に拡管しようとする金属管の端部を挿通した後、該挿
通した金属管の端部内に潤滑油を塗布した拡管用マンド
レルを押し込んで拡管する金属管の拡管方法において、
前記拡管用マンドレルとして外周上に円周方向に刻まれ
た潤滑油溜め用外周溝が設けられている外周溝付拡管用
マンドレルを用いることを特徴とする金属管の拡管方
法。4. A mandrel for expanding a pipe, wherein an end of a metal pipe to be expanded is inserted into a hole formed in a group of a plurality of metal plates, and lubricating oil is applied to an end of the inserted metal pipe. In the method of expanding a metal pipe which is expanded by pushing
A method for expanding a metal pipe, comprising using an expansion grooved mandrel provided with an outer circumferential groove for a lubricating oil reservoir formed on an outer circumference in a circumferential direction as the expansion mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289254A JP2000117362A (en) | 1998-10-12 | 1998-10-12 | Mandrel for expanding metallic tube, and expanding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289254A JP2000117362A (en) | 1998-10-12 | 1998-10-12 | Mandrel for expanding metallic tube, and expanding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000117362A true JP2000117362A (en) | 2000-04-25 |
Family
ID=17740786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10289254A Pending JP2000117362A (en) | 1998-10-12 | 1998-10-12 | Mandrel for expanding metallic tube, and expanding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000117362A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431006A (en) * | 2011-10-17 | 2012-05-02 | 河南柴油机重工有限责任公司 | Pinhole extrusion sealing method and tool |
| WO2012102961A1 (en) * | 2011-01-24 | 2012-08-02 | Carrier Corporation | Lubrication drying process for tube |
| WO2014010387A1 (en) * | 2012-07-13 | 2014-01-16 | 住友軽金属工業株式会社 | Tube expansion plug |
| WO2014010366A1 (en) * | 2012-07-13 | 2014-01-16 | 住友軽金属工業株式会社 | Tube expansion plug |
| CN103894502A (en) * | 2014-03-28 | 2014-07-02 | 广东格兰仕集团有限公司 | Oval-tube expander device and mould for manufacturing oval tubes |
| JP2015150566A (en) * | 2014-02-10 | 2015-08-24 | 三菱アルミニウム株式会社 | Tube expansion plug |
-
1998
- 1998-10-12 JP JP10289254A patent/JP2000117362A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012102961A1 (en) * | 2011-01-24 | 2012-08-02 | Carrier Corporation | Lubrication drying process for tube |
| CN102431006A (en) * | 2011-10-17 | 2012-05-02 | 河南柴油机重工有限责任公司 | Pinhole extrusion sealing method and tool |
| WO2014010387A1 (en) * | 2012-07-13 | 2014-01-16 | 住友軽金属工業株式会社 | Tube expansion plug |
| WO2014010366A1 (en) * | 2012-07-13 | 2014-01-16 | 住友軽金属工業株式会社 | Tube expansion plug |
| CN103537572A (en) * | 2012-07-13 | 2014-01-29 | 住友轻金属工业株式会社 | Tube expansion plug |
| CN103537573A (en) * | 2012-07-13 | 2014-01-29 | 住友轻金属工业株式会社 | Tube expansion plug |
| JPWO2014010366A1 (en) * | 2012-07-13 | 2016-06-20 | 株式会社Uacj | Plug for expansion |
| JPWO2014010387A1 (en) * | 2012-07-13 | 2016-06-20 | 株式会社Uacj | Plug for expansion |
| JP2015150566A (en) * | 2014-02-10 | 2015-08-24 | 三菱アルミニウム株式会社 | Tube expansion plug |
| CN103894502A (en) * | 2014-03-28 | 2014-07-02 | 广东格兰仕集团有限公司 | Oval-tube expander device and mould for manufacturing oval tubes |
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