JPH06269853A - Manufacture of double walled steel tube - Google Patents
Manufacture of double walled steel tubeInfo
- Publication number
- JPH06269853A JPH06269853A JP8245693A JP8245693A JPH06269853A JP H06269853 A JPH06269853 A JP H06269853A JP 8245693 A JP8245693 A JP 8245693A JP 8245693 A JP8245693 A JP 8245693A JP H06269853 A JPH06269853 A JP H06269853A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- steel pipe
- diameter
- outside
- steel
- 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
Links
Landscapes
- Metal Extraction Processes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車や各種の機械装
置等において、気体、液体、粉粒体等を高圧力で供給す
るための二重鋼管の製造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 method for manufacturing a double steel pipe for supplying gas, liquid, powder or the like at high pressure in an automobile or various mechanical devices.
【０００２】[0002]
【従来の技術】従来、金属メッキ膜を使用して二本ある
いは複数本の鋼管を一体化する技術としては、例えば一
例として、特公昭５８−１４３１０号が提供されてい
る。これは、線膨張係数の相違する複数の鋼管群を、内
側に向けて順次線膨張係数の大きい順に内外嵌合重層
し、これらの鋼管群は対接面において金属メッキ膜によ
り相互融着したものである。2. Description of the Related Art Conventionally, as a technique for integrating two or more steel pipes using a metal plating film, for example, Japanese Patent Publication No. 58-14310 has been provided. This is one in which a plurality of steel pipe groups with different linear expansion coefficients are laminated inward and outward in order of increasing linear expansion coefficient toward the inside, and these steel pipe groups are mutually fused by a metal plating film on the contact surface. Is.
【０００３】また、他の例としては図４に示すように、
巾広、長尺な金属板を長さ方向にそって複数層に巻き回
し、少なくとも接合面において金属メッキ膜により熱融
着した多層構造の一本の鋼管ａを形成するものである。As another example, as shown in FIG.
A wide and long metal plate is wound in a plurality of layers along the length direction, and at least the joint surface is heat-sealed with a metal plating film to form a single steel pipe a having a multilayer structure.
【０００４】[0004]
【発明が解決しようとする課題】上記する従来技術にお
いて、第１例のものは線膨張係数の異なる複数の鋼管を
使用するが、鋼管の材質が特殊なものでなければならな
い。また、複数の鋼管からなる鋼管群の径を任意に選択
することができない問題点を有している。In the prior art described above, the first example uses a plurality of steel pipes having different linear expansion coefficients, but the steel pipe must be made of a special material. Further, there is a problem that the diameter of the steel pipe group composed of a plurality of steel pipes cannot be arbitrarily selected.
【０００５】第２例のものは一枚の金属板を渦巻き状に
巻き回して鋼管ａを形成するものであるが、巻き回し方
向における端縁部ｂ、ｃが、金属板の板厚分、内径およ
び外径に突き出た状態となるため、鋼管ａ内に棒状体や
他の鋼管等を差し込んだ場合、端縁部ｂで隙間が形成さ
れることになり、密な連結状態とすることができない。
また、鋼管ａを他の鋼管内に差し込んだり、機械装置等
に形成した連結孔に差し込んだ場合も外径の端縁部ｃの
板厚によって隙間が形成される問題点を有していた。The second example is one in which one metal plate is spirally wound to form a steel pipe a, and the end edges b and c in the winding direction are the thickness of the metal plate, Since it is projected to the inner diameter and the outer diameter, when a rod-shaped body or another steel pipe is inserted into the steel pipe a, a gap is formed at the end edge portion b, which may result in a tightly connected state. Can not.
Further, when the steel pipe a is inserted into another steel pipe or inserted into a connecting hole formed in a mechanical device or the like, there is a problem that a gap is formed due to the plate thickness of the edge portion c having the outer diameter.
【０００６】本発明は、上記する従来の多層鋼管の製造
技術に鑑み、径および材質を異にする二本の鋼管を同心
筒状体に密に重合し、両鋼管の重合面を金属メッキ膜に
よって熱融着して一本の鋼管を形成するための二重鋼管
の製造方法を提供するものである。また、本発明は、内
径および外径を任意に選択することのできる二重鋼管の
製造方法を提供するものである。In view of the above-mentioned conventional manufacturing technique for a multi-layer steel pipe, the present invention densely polymerizes two steel pipes having different diameters and different materials into a concentric tubular body, and deposits the superposed surfaces of both steel pipes with a metal plating film. The present invention provides a method for manufacturing a double steel pipe for forming a single steel pipe by heat fusion. Further, the present invention provides a method for manufacturing a double steel pipe whose inner diameter and outer diameter can be arbitrarily selected.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、径および材質を異にする二本の鋼管２、
３を引抜き加工により同心筒状体に重合し、重合面を溶
融メッキにより熱融着したものである。また、ダイス６
に形成した整形孔７の内径を選択することにより二本の
鋼管２、３からなる同心筒状体の板厚および径を決定す
ることが可能である。In order to achieve the above object, the present invention provides two steel pipes 2 having different diameters and different materials.
3 is polymerized into a concentric cylindrical body by a drawing process, and the polymerized surface is heat-sealed by hot dipping. Also, die 6
It is possible to determine the plate thickness and the diameter of the concentric tubular body composed of the two steel pipes 2 and 3 by selecting the inner diameter of the shaping hole 7 formed in the above.
【０００８】[0008]
【実施例】以下、図面に従って、本発明の一実施例を詳
細に説明する。図１は本発明製造方法によって形成され
た二重鋼管を示すものであり、二重鋼管１は、基本的に
は径および材質を異にする二本の鋼管２、３を引抜き加
工により重合して同心筒状体に形成し、両鋼管２、３の
重合面を溶融メッキにより熱融着して一本化したもので
ある。An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a double steel pipe formed by the manufacturing method of the present invention. The double steel pipe 1 is basically formed by drawing two steel pipes 2 and 3 having different diameters and different materials by drawing. Is formed into a concentric cylindrical body, and the superposed surfaces of the steel pipes 2 and 3 are heat-sealed by hot dipping to be unified.
【０００９】次に、二重鋼管１の製造工程について説明
する。本実施例においては、内側の小径鋼管２をステン
レス製とし、外側の大径鋼管３を鉄製とした場合であ
り、継目無し鋼管の他に電縫鋼管を使用することができ
る。また、鋼管２の表面には、あらかじめ、銅や真鍮、
錫等のステンレスや鉄よりも融点の低い金属メッキ膜４
を形成しておく。Next, the manufacturing process of the double steel pipe 1 will be described. In this embodiment, the inner small-diameter steel pipe 2 is made of stainless steel and the outer large-diameter steel pipe 3 is made of iron. In addition to the seamless steel pipe, an electric resistance welded steel pipe can be used. Also, on the surface of the steel pipe 2, copper, brass,
Metal plating film 4 with a lower melting point than stainless steel such as tin or iron 4
Is formed.
【００１０】まず、小径鋼管２を大径鋼管３内に挿通
し、図２に一点鎖線で示すように、鋼管３の片側端部を
適当な長さ間隔で圧縮し、鋼管２に巻き締めた状態とす
る。この巻き締め先端部５を、図３に示すように、ダイ
ス６に先細り形状に形成した整形孔７の大径側から挿通
し、反対側に突出させる。従って、先端部５の外径は、
整形孔７の最も小さい径と同じとなっている。First, the small-diameter steel pipe 2 is inserted into the large-diameter steel pipe 3, and one end portion of the steel pipe 3 is compressed at an appropriate length interval as shown by the alternate long and short dash line in FIG. State. As shown in FIG. 3, the winding tightening tip portion 5 is inserted from the large diameter side of the shaping hole 7 formed in the die 6 in a tapered shape, and is projected to the opposite side. Therefore, the outer diameter of the tip 5 is
It is the same as the smallest diameter of the shaping hole 7.
【００１１】ダイス６から突出した先端部５は、図示し
ないチャックで強くつかむ。このチャックはダイス６に
対して往復移動可能となっており、かつ強い力で鋼管
２、３を整形孔７から引抜き可能となっている。ダイス
６およびチャック等は従来公知のものを使用することが
できる。The tip portion 5 protruding from the die 6 is firmly grasped by a chuck (not shown). This chuck can reciprocate with respect to the die 6, and can pull out the steel pipes 2 and 3 from the shaping hole 7 with a strong force. As the die 6 and the chuck, conventionally known ones can be used.
【００１２】チャックによって二本の鋼管２、３を整形
孔７から引き抜けば、大径の鋼管３は、伸管作用により
鋼管２の外周面に密に重合するように小径化される。こ
のようにして径を異にする二本の鋼管２、３を同心筒状
体に形成した後、鋼管２、３を例えば加熱炉内で適宜温
度で加熱すれば、鋼管２の表面に付着している金属メッ
キ膜４が溶け、両鋼管２、３は溶融メッキにより重合面
で一体的に結合され、一本の二重鋼管１が得られる。
尚、鋼管２、３の引抜き加工は、数回繰り返して行われ
るが、電縫鋼管を使用すれば引抜き回数を少なくするこ
とができる。When the two steel pipes 2 and 3 are pulled out from the shaping hole 7 by the chuck, the large-diameter steel pipe 3 is reduced in diameter so as to be densely polymerized on the outer peripheral surface of the steel pipe 2 by the expanding action. After the two steel pipes 2 and 3 having different diameters are formed into a concentric tubular body in this way, the steel pipes 2 and 3 are heated to an appropriate temperature in, for example, a heating furnace to adhere to the surface of the steel pipe 2. The metal plating film 4 that has melted is melted, and the two steel pipes 2 and 3 are integrally joined at the polymerization surface by hot dipping, so that one double steel pipe 1 is obtained.
The drawing of the steel pipes 2 and 3 is repeated several times, but the number of times of drawing can be reduced by using an electric resistance welded steel pipe.
【００１３】上記するダイス６の整形孔７は、鋼管３を
引抜きによって小径化し、鋼管２に密に嵌合する場合で
あり、鋼管２の径が変わることはない。整形孔７の内径
を選択することにより二重鋼管１の内径および外径を任
意に選ぶことができる。例えば、整形孔７の内径を鋼管
２の外径より小さくし、二本の鋼管２、３を同時に引き
抜けば、内側の鋼管２も径を小さくした状態となり、二
重鋼管１を小径管とすることができる。この場合、図３
に示すように、鋼管２内にマンドレル棒８を挿入し、こ
のマンドレル棒８先端のプラグ９と整形孔７との位置関
係を調節することにより、引抜きに際して二重鋼管１の
板厚や内径を選択することができる。The shaping hole 7 of the die 6 described above is a case where the diameter of the steel pipe 3 is reduced by drawing and tightly fits the steel pipe 2, and the diameter of the steel pipe 2 does not change. By selecting the inner diameter of the shaping hole 7, the inner diameter and the outer diameter of the double steel pipe 1 can be arbitrarily selected. For example, if the inner diameter of the shaping hole 7 is made smaller than the outer diameter of the steel pipe 2 and the two steel pipes 2 and 3 are pulled out at the same time, the inner steel pipe 2 also becomes in a state of having a small diameter, and the double steel pipe 1 becomes a small diameter pipe. can do. In this case,
As shown in, the mandrel rod 8 is inserted into the steel pipe 2 and the positional relationship between the plug 9 at the tip of the mandrel rod 8 and the shaping hole 7 is adjusted so that the thickness and the inner diameter of the double steel pipe 1 at the time of drawing can be adjusted. You can choose.
【００１４】また、特公昭５３−３４７９９号の超音波
振動伸管装置に示されるように、プラグ９に超音波振動
を与えつつ鋼管２、３の引抜き作業を行うことにより、
引抜き加工を容易に行うとともに鋼管２の内面を鏡面仕
上げとすることができる。Further, as shown in Japanese Patent Publication No. 53-34799, an ultrasonic vibration expanding device, by pulling the steel pipes 2 and 3 while applying ultrasonic vibration to the plug 9,
The drawing process can be easily performed, and the inner surface of the steel pipe 2 can be mirror-finished.
【００１５】上記の実施例においては内側の鋼管２をス
テンレスとし、外側の鋼管３を鉄とした場合であるが、
これは鋼管２内を通る物質による腐食を防止するためで
ある。二重鋼管１の使用状態によっては外側の鋼管３の
腐食を防止する必要があるが、この場合には内側の鋼管
２を鉄とし、外側の鋼管３をステンレスとすればよい。
また、ステンレスや鉄に限らず他の金属材を使用するこ
とも可能である。更に、内側鋼管２の表面に金属メッキ
膜４を形成した場合について説明したが、外側鋼管３の
内面全面にメッキ膜４を形成するようにしてもよい。In the above embodiment, the inner steel pipe 2 is made of stainless steel and the outer steel pipe 3 is made of iron.
This is to prevent corrosion due to substances passing through the steel pipe 2. It is necessary to prevent corrosion of the outer steel pipe 3 depending on the usage state of the double steel pipe 1, but in this case, the inner steel pipe 2 may be made of iron and the outer steel pipe 3 may be made of stainless steel.
Further, it is possible to use not only stainless steel and iron but also other metal materials. Furthermore, although the case where the metal plating film 4 is formed on the surface of the inner steel pipe 2 has been described, the plating film 4 may be formed on the entire inner surface of the outer steel pipe 3.
【００１６】[0016]
【発明の効果】以上、説明した本発明によれば、径およ
び材質を異にする鋼管２、３を引抜き加工によって同心
筒状体に形成することができ、重合状態の両鋼管２、３
を加熱することにより重合面の金属メッキ膜４は融け、
両鋼管２、３は重合面で接着され、一本の二重鋼管１の
製造が可能となる。According to the present invention described above, the steel pipes 2 and 3 having different diameters and materials can be formed into a concentric cylindrical body by a drawing process, and the steel pipes 2 and 3 in a superposed state can be formed.
The metal plating film 4 on the overlapping surface is melted by heating the
The two steel pipes 2 and 3 are adhered to each other at the overlapping surface, so that one double steel pipe 1 can be manufactured.
【００１７】二重鋼管１であるから堅牢であるとともに
内外の鋼管２、３の材質を異にしてあるので、内外鋼管
２、３の金属材質を選択することにより腐食を防止する
ことができる。Since the double steel pipe 1 is robust, the inner and outer steel pipes 2 and 3 are made of different materials, so corrosion can be prevented by selecting the metal material of the inner and outer steel pipes 2 and 3.
【００１８】また、本発明による二重鋼管１は、ダイス
６の整形孔７を通す引抜き加工によって形成可能である
から、整形孔７の内径によって二重鋼管１の内外径を決
定することができ、引抜きに際して鋼管２内に挿入した
マンドレル８のプラグ９を使用することにより内径およ
び肉厚等を自由に選ぶことができる。Further, since the double steel pipe 1 according to the present invention can be formed by drawing through the shaping hole 7 of the die 6, the inner and outer diameters of the double steel pipe 1 can be determined by the inner diameter of the shaping hole 7. By using the plug 9 of the mandrel 8 inserted into the steel pipe 2 at the time of drawing, the inner diameter and the wall thickness can be freely selected.
【図１】本発明方法により製造した二重鋼管の斜視図で
ある。FIG. 1 is a perspective view of a double steel pipe manufactured by the method of the present invention.
【図２】径を異にする鋼管のうち外側鋼管の先端部を内
側鋼管に巻き締めた状態の斜視図である。FIG. 2 is a perspective view showing a state in which a tip of an outer steel pipe among steel pipes having different diameters is wound around an inner steel pipe.
【図３】径を異にする二本の鋼管をダイスにより引き抜
く状態の断面図である。FIG. 3 is a cross-sectional view showing a state where two steel pipes having different diameters are pulled out by a die.
【図４】従来の多層管の一例を示す正面図である。FIG. 4 is a front view showing an example of a conventional multilayer tube.
１ 二重鋼管 ２ 鋼管 ３ 鋼管 ４ 金属メッキ膜 ５ 巻き締め先端部 ６ ダイス ７ 整形孔 ８ マンドレル ９ プラグ 1 Double Steel Pipe 2 Steel Pipe 3 Steel Pipe 4 Metal Plated Film 5 Tightening Tip 6 Die 7 Shaping Hole 8 Mandrel 9 Plug
Claims (2)
３を引抜き加工により同心筒状体に重合し、重合面を溶
融メッキにより熱融着して成ることを特徴とする二重鋼
管の製造方法。1. Two steel pipes 2 having different diameters and different materials,
A method for producing a double steel pipe, characterized in that 3 is polymerized into a concentric cylindrical body by a drawing process, and the polymerized surface is heat-sealed by hot dip plating.
択することにより二本の鋼管２、３からなる同心筒状体
の板厚および径を決定するようにした請求項１に記載す
る二重鋼管の製造方法。2. The plate thickness and diameter of a concentric tubular body composed of two steel pipes 2 and 3 are determined by selecting the inner diameter of the shaping hole 7 formed in the die 6. Double steel pipe manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8245693A JPH06269853A (en) | 1993-03-18 | 1993-03-18 | Manufacture of double walled steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8245693A JPH06269853A (en) | 1993-03-18 | 1993-03-18 | Manufacture of double walled steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06269853A true JPH06269853A (en) | 1994-09-27 |
Family
ID=13775020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8245693A Pending JPH06269853A (en) | 1993-03-18 | 1993-03-18 | Manufacture of double walled steel tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06269853A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100723900B1 (en) * | 2004-06-17 | 2007-06-04 | 우수이 고쿠사이 산교 가부시키가이샤 | High-pressure fuel injection pipe |
| JP2010078062A (en) * | 2008-09-26 | 2010-04-08 | Nippon Steel Corp | Collision energy absorbing steel pipe and method for manufacturing the same |
| CN103170521A (en) * | 2011-12-20 | 2013-06-26 | 北京隆盛泰科石油管科技有限公司 | Method for producing inner liner bimetal composite tube through adopting stepping diameter expansion technology |
| CN112238517A (en) * | 2020-09-21 | 2021-01-19 | 浙江大大不锈钢有限公司 | Production process of high-pressure-resistance stainless steel seamless steel pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197081A (en) * | 1988-01-29 | 1989-08-08 | Sumitomo Metal Ind Ltd | Manufacture of high corrosion resistant double metal pipe |
| JPH02205262A (en) * | 1989-01-31 | 1990-08-15 | Shonan Kiko Kk | Production of double-layer metallic joined pipe |
| JPH03275214A (en) * | 1990-03-26 | 1991-12-05 | Suzuka Fuji Xerox Kk | Multilayered metallic pipe, manufacture thereof and injecting needle |
-
1993
- 1993-03-18 JP JP8245693A patent/JPH06269853A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197081A (en) * | 1988-01-29 | 1989-08-08 | Sumitomo Metal Ind Ltd | Manufacture of high corrosion resistant double metal pipe |
| JPH02205262A (en) * | 1989-01-31 | 1990-08-15 | Shonan Kiko Kk | Production of double-layer metallic joined pipe |
| JPH03275214A (en) * | 1990-03-26 | 1991-12-05 | Suzuka Fuji Xerox Kk | Multilayered metallic pipe, manufacture thereof and injecting needle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100723900B1 (en) * | 2004-06-17 | 2007-06-04 | 우수이 고쿠사이 산교 가부시키가이샤 | High-pressure fuel injection pipe |
| JP2010078062A (en) * | 2008-09-26 | 2010-04-08 | Nippon Steel Corp | Collision energy absorbing steel pipe and method for manufacturing the same |
| CN103170521A (en) * | 2011-12-20 | 2013-06-26 | 北京隆盛泰科石油管科技有限公司 | Method for producing inner liner bimetal composite tube through adopting stepping diameter expansion technology |
| CN112238517A (en) * | 2020-09-21 | 2021-01-19 | 浙江大大不锈钢有限公司 | Production process of high-pressure-resistance stainless steel seamless steel pipe |
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