JP2010012515A - Metallic pipe and manufacturing method thereof - Google Patents

Metallic pipe and manufacturing method thereof Download PDF

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JP2010012515A
JP2010012515A JP2008177268A JP2008177268A JP2010012515A JP 2010012515 A JP2010012515 A JP 2010012515A JP 2008177268 A JP2008177268 A JP 2008177268A JP 2008177268 A JP2008177268 A JP 2008177268A JP 2010012515 A JP2010012515 A JP 2010012515A
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fitting
fitting portion
metal pipe
flat plate
bending
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Koji Owashi
浩司 大鷲
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KIYOKUNI KK
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KIYOKUNI KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic pipe and a manufacturing method thereof by which the metallic pipe can easily and inexpensively be manufactured by eliminating positioning and holding work in the joining part when manufacturing the metallic pipe by bending a rectangular planar body. <P>SOLUTION: The metallic pipe 1 is formed by bending the rectangular planar body, and includes: a first fitting part 10 where is formed on one side face in the longitudinal direction of the planar body; and a second fitting part 20 where is formed on the other side face opposing to the one side face and fit to the first fitting part. It is preferable that at least one or more first fitting parts and second fitting parts are respectively formed on the side faces of the planar body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、金属パイプ及びその製造方法に関し、詳しくは、低コストで、且つ容易に製造することができる金属パイプ及びその製造方法に関する。   The present invention relates to a metal pipe and a manufacturing method thereof, and more particularly to a metal pipe that can be easily manufactured at low cost and a manufacturing method thereof.

一般的な金属管は、矩形の金属板を湾曲させ、その両側端を継ぎ合わせることにより筒状体に形成される。この際、一方の長手方向側面を外側に、対向する他方の側面をその内側に配設させ、その接合部分をプレス加工や溶接等により継ぎ合わせる。   A general metal tube is formed into a cylindrical body by curving a rectangular metal plate and joining both side ends thereof. At this time, one side surface in the longitudinal direction is disposed on the outer side, and the other side surface on the other side is disposed on the inner side, and the joint portion is joined by pressing or welding.

しかし、上記の方法により金属管を製造する場合、継目部分の正確な位置合わせに高度の技術が必要であった。また、継ぎ合わせた状態を保持するために作業工程が増えると共に、作業中における危険性も増した。さらに、通常の方法により形成された金属管は、径や長さが規格化されており、規格外の径や長さの金属管を形成するには多くの製造コストを要した。   However, when manufacturing a metal tube by the above method, a high level of technology is required for accurate alignment of the seam portion. In addition, the number of work processes is increased to maintain the joined state, and the danger during work is also increased. Furthermore, the diameter and length of the metal tube formed by a normal method are standardized, and a lot of manufacturing costs are required to form a metal tube having a diameter or length outside the standard.

かかる状況下、真円度の高い小径厚肉金属管を、厚肉金属板から成形することができる金属管の製造方法が提案されている(例えば、特許文献1参照)。
この特許文献1の金属管の製造方法は、金属板を矩形に切断して素材を形成する工程と、素材の相対向する両端部に傾斜付けをする工程と、外周面が製品管の曲率に近づくように素材の両端部を押し潰す工程と、素材の両端部を端曲げる工程と、素材をU形に形成する工程と、U形に形成した素材をO形に成形する工程とを有する。
特開平11−156440号公報
Under such circumstances, a method of manufacturing a metal tube that can form a small-diameter thick metal tube having a high roundness from a thick metal plate has been proposed (see, for example, Patent Document 1).
In this method of manufacturing a metal tube of Patent Document 1, a material is formed by cutting a metal plate into a rectangle, a step of inclining both opposite ends of the material, and the outer peripheral surface has a curvature of the product tube. It has the process of crushing the both ends of a raw material so that it may approach, the process of bending both ends of a raw material, the process of forming a raw material in U shape, and the process of forming the material formed in U shape into O form.
JP-A-11-156440

しかしながら、上掲特許文献1の金属管の製造方法においては、小径厚肉金属管を成形するには適しているが、薄肉で大径状の金属パイプを成形するには向いていなかった。即ち、接合部分における傾斜付けや位置決めに高い技術を必要とした。   However, the metal pipe manufacturing method disclosed in Patent Document 1 is suitable for forming a small-diameter thick metal pipe, but is not suitable for forming a thin-walled large-diameter metal pipe. That is, a high technique is required for tilting and positioning at the joint.

そこで本発明の目的は、矩形の平板状体を湾曲させて金属パイプを製造する際、接合部分における位置決めや保持作業をなくし、容易に、且つ低コストで製造することができる金属パイプ及びその製造方法を提供することにある。   Accordingly, an object of the present invention is to provide a metal pipe that can be manufactured easily and at a low cost by eliminating the positioning and holding work at the joint portion when a metal pipe is manufactured by curving a rectangular flat plate-shaped body. It is to provide a method.

上記課題を解決するために本発明の金属パイプは、矩形の平板状体を湾曲させることにより形成された金属パイプであって、
長手方向の一側面に形成された第一嵌合部と、前記一側面と対向する他側面に形成された、前記第一嵌合部と嵌合する第二嵌合部とを備えることを特徴とするものである。
In order to solve the above problems, the metal pipe of the present invention is a metal pipe formed by curving a rectangular flat plate,
A first fitting portion formed on one side surface in the longitudinal direction, and a second fitting portion formed on the other side surface facing the one side surface and fitted with the first fitting portion. It is what.

本発明の金属パイプにおいては、前記第一嵌合部と第二嵌合部とは、前記平板状体の側面に夫々少なくとも1つ以上形成されていることが好ましい。   In the metal pipe of the present invention, it is preferable that at least one or more of the first fitting portion and the second fitting portion are formed on a side surface of the flat plate-like body.

また、前記第一嵌合部が、前記平板状体の一側面より突出する先方円形状の主嵌合部と、該主嵌合部の両側に形成された、平板状体の側面内側に穿設された凹部とを備え、前記第二嵌合部が、前記平板状体の他側面内側に穿設された、前記主嵌合部が嵌入される嵌合切欠部と、嵌合切欠部の両側に形成された、前記第一嵌合部の凹部に嵌合される嵌合凸部とを備えることが好ましい。   In addition, the first fitting portion has a front circular main fitting portion that protrudes from one side surface of the flat plate-like body, and is formed on the inner side surface of the flat plate member formed on both sides of the main fitting portion. Provided with a recessed portion provided, wherein the second fitting portion is formed on the other side inner side of the flat plate-like body, a fitting notch portion into which the main fitting portion is fitted, and a fitting notch portion It is preferable to include fitting convex portions that are formed on both sides and are fitted into the concave portions of the first fitting portion.

さらに、前記第一嵌合部と第二嵌合部との嵌合部分に、カシメ部を形成したことが好ましい。   Furthermore, it is preferable that a crimping portion is formed at a fitting portion between the first fitting portion and the second fitting portion.

本発明の金属パイプの製造方法は、前記金属パイプの製造方法において、
第一嵌合部と第二嵌合部を有する平板状体を成形する打ち抜き工程と、第一嵌合部と第二嵌合部の基部分を角度曲げする角度曲工程と、平板状体を長手方向にW状に曲げるW曲工程と、W曲工程の後、平板状体をU字状に曲げるU曲工程と、第一嵌合部と第二嵌合部とを嵌合させる嵌合工程と、を含むことを特徴とする金属パイプの製造方法。
第一嵌合部と第二嵌合部を有する平板状体を成形する打ち抜き工程と、第一嵌合部と第二嵌合部の基部分を角度曲げする角度曲工程と、平板状体を長手方向にW状に曲げるW曲工程と、W曲工程の後、平板状体をU字状に曲げるU曲工程と、第一嵌合部と第二嵌合部とを嵌合させる嵌合工程と、を含むことを特徴とするものである。
The metal pipe manufacturing method of the present invention is the metal pipe manufacturing method,
A punching step for forming a flat plate having a first fitting portion and a second fitting portion, an angle bending step for bending the base portion of the first fitting portion and the second fitting portion, and a flat plate W-bending step for bending in the W shape in the longitudinal direction, U-bending step for bending the flat body into a U-shape after the W-bending step, and fitting for fitting the first fitting portion and the second fitting portion. A process for producing a metal pipe.
A punching step for forming a flat plate having a first fitting portion and a second fitting portion, an angle bending step for bending the base portion of the first fitting portion and the second fitting portion, and a flat plate W-bending step for bending in the W shape in the longitudinal direction, U-bending step for bending the flat plate into a U-shape after the W-bending step, and fitting for fitting the first fitting portion and the second fitting portion. And a process.

本発明の製造方法においては、前記嵌合工程の後、嵌合部分にカシメ加工を施すことができる。   In the manufacturing method of the present invention, after the fitting step, the fitting portion can be crimped.

本発明の金属パイプによれば、第一嵌合部と第二嵌合部との嵌合により、両側部分の位置決めを容易に行うことができる。また、嵌合部同士が嵌合されるので、保持作業等がなくなり、製造工程が削減でき、さらに安全性も確保される。   According to the metal pipe of the present invention, the both side portions can be easily positioned by fitting the first fitting portion and the second fitting portion. In addition, since the fitting portions are fitted to each other, there is no holding work and the like, the manufacturing process can be reduced, and safety is also ensured.

さらに、第一嵌合部と第二嵌合部との嵌合部分に、カシメ部を形成したことで、嵌合強度が一層向上すると共に、外観的な美観も良好なものとなる。   Furthermore, by forming the crimped portion in the fitting portion between the first fitting portion and the second fitting portion, the fitting strength is further improved and the appearance and appearance are also good.

以下、本発明の金属パイプ及びその製造方法における実施の形態を説明する。
図3に示す本発明の好適例である金属パイプ1は、矩形の平板状体2を湾曲させることにより形成された金属パイプであり、長手方向の一側面aに形成された第一嵌合部10と、一側面aと対向する他側面bに形成された、第一嵌合部10と嵌合する第二嵌合部20とを備える。
Hereinafter, embodiments of the metal pipe and the manufacturing method thereof according to the present invention will be described.
A metal pipe 1 which is a preferred example of the present invention shown in FIG. 3 is a metal pipe formed by curving a rectangular flat plate-like body 2, and a first fitting portion formed on one side surface a in the longitudinal direction. 10 and a second fitting portion 20 that is formed on the other side surface b opposite to the one side surface a and fits with the first fitting portion 10.

これにより、接合部分における位置決めや保持作業をなくすことで、容易に、且つ低コストで製造することができることを特徴とする。   Thereby, it can be manufactured easily and at low cost by eliminating the positioning and holding work at the joint portion.

また、本発明の金属パイプは、金属厚や形成される径を任意に調整できるため広範囲に使用できる。さらに、かかる金属パイプは、プリンタのプラテンローラをはじめ、ファクシミリや複写機などといった事務機器のローラに好適に使用することができる。   The metal pipe of the present invention can be used in a wide range because the metal thickness and the diameter to be formed can be adjusted arbitrarily. Furthermore, such a metal pipe can be suitably used for a roller of an office machine such as a printer or a copying machine as well as a platen roller of a printer.

この際、金属パイプの長さは、好ましくは200〜2000mmであり、また、その径は、好ましくは10〜40mmφ程度である。   At this time, the length of the metal pipe is preferably 200 to 2000 mm, and the diameter is preferably about 10 to 40 mmφ.

図1及び図2に示す矩形の平板状体2は、鉄、アルミ、ステンレス等の金属性の平状体である。この平板状体2の長手方向の一側面aに形成された第一嵌合部10と、一側面aと対向する他側面bに形成された、第一嵌合部2と嵌合する第二嵌合部20とを備えており、第一嵌合部10は、平板状体2の一側面より突出する先方円形状の主嵌合部11と、主嵌合部11の両側に形成された、平板状体2の側面内側に穿設された凹部14とを有する。   A rectangular flat plate body 2 shown in FIGS. 1 and 2 is a flat metal body such as iron, aluminum, and stainless steel. A first fitting portion 10 formed on one side surface a in the longitudinal direction of the flat plate-like body 2 and a second fitting portion 2 formed on the other side surface b opposite to the one side surface a. The first fitting portion 10 is formed on the both sides of the main fitting portion 11 and a main circular fitting portion 11 that protrudes from one side surface of the flat plate-like body 2. And a concave portion 14 formed on the inner side surface of the flat plate-like body 2.

図示する好適例では、第一嵌合部10における主嵌合部11は、平板状体2の一側面より連設されたアーム部12と、アーム部12の先方に形成された円形部13とからなる。また、円形部13の先端部分は、変形を軽減させるための平坦部15が形成されている。さらに円形部13の先方は、平板状体2の一側面aよりやや外側に突出した状態に形成されている。   In the illustrated preferred example, the main fitting portion 11 in the first fitting portion 10 includes an arm portion 12 provided continuously from one side surface of the flat plate-like body 2, and a circular portion 13 formed at the front of the arm portion 12. Consists of. Moreover, the flat part 15 for reducing a deformation | transformation is formed in the front-end | tip part of the circular part 13. As shown in FIG. Further, the tip of the circular portion 13 is formed so as to protrude slightly outward from one side surface a of the plate-like body 2.

また、第一嵌合部10における凹部14は、主嵌合部11のアーム部12の両側に形成されており、平板状体2の一側面aの内側方向に矩形状に穿設されている。また第一嵌合部10は、適宜間隔で平板状体2の一側面aに複数形成されている。   Further, the recesses 14 in the first fitting portion 10 are formed on both sides of the arm portion 12 of the main fitting portion 11 and are formed in a rectangular shape in the inner side direction of the one side surface a of the flat plate-like body 2. . A plurality of first fitting portions 10 are formed on one side surface a of the flat plate-like body 2 at appropriate intervals.

第二嵌合部20は、第一嵌合部10と嵌合されるもので、一側面aと対向する他側面bに形成されており、さらに各第一嵌合部10と対向する位置に形成されている。   The second fitting portion 20 is fitted to the first fitting portion 10, is formed on the other side surface b facing the one side surface a, and is further at a position facing each first fitting portion 10. Is formed.

かかる第二嵌合部20は、平板状体2の他側面b内側に穿設された、第一嵌合部10の主嵌合部11が嵌合する嵌合切欠部21と、嵌合切欠部21の両側に形成された、第一嵌合部10の凹部14に嵌合する嵌合凸部24とを備える。   The second fitting portion 20 includes a fitting notch portion 21 formed on the inside of the other side surface b of the flat plate-like body 2 and into which the main fitting portion 11 of the first fitting portion 10 is fitted, and a fitting notch And fitting protrusions 24 that are formed on both sides of the portion 21 and fit into the recesses 14 of the first fitting portion 10.

第二嵌合部20における嵌合切欠部21は、短冊状切欠部22と、短冊状切欠部22に連設された円形切欠部23とからなる。また、円形切欠部23の先端は平坦部25が形成されている。さらに、嵌合凸部24は、他側面bの外側に突出した状態で一対形成されている。さらにまた、第二嵌合部20は、第一嵌合部10に対向する位置に複数形成されている。   The fitting notch 21 in the second fitting part 20 includes a strip-like notch 22 and a circular notch 23 provided continuously to the strip-like notch 22. A flat portion 25 is formed at the tip of the circular cutout portion 23. Furthermore, the fitting convex part 24 is formed in a pair in a state of projecting to the outside of the other side face b. Furthermore, a plurality of second fitting portions 20 are formed at positions facing the first fitting portion 10.

第一嵌合部10の主嵌合部11は、第二嵌合部20の嵌合切欠部21より僅かに小さく形成されており、第二嵌合部20の嵌合凸部24は、第一嵌合部10の凹部14より僅かに小さく形成されている。そのため、図3及び図4に示すように、第一嵌合部10と第二嵌合部20とは殆ど密着された状態に嵌合される。また、嵌合部10,20を形成する際、実際上は夫々側面に僅かなバリが形成されるため、嵌合状態が一層向上する。これにより、円筒の筒状体を形成した後に発生するスプリングバック(後戻り)を解消することができる。   The main fitting part 11 of the first fitting part 10 is formed slightly smaller than the fitting notch part 21 of the second fitting part 20, and the fitting convex part 24 of the second fitting part 20 is It is formed slightly smaller than the recessed portion 14 of the one fitting portion 10. Therefore, as shown in FIG.3 and FIG.4, the 1st fitting part 10 and the 2nd fitting part 20 are fitted by the state closely_contact | adhered. In addition, when the fitting portions 10 and 20 are formed, the burrs are actually formed on the side surfaces, so that the fitting state is further improved. Thereby, the springback (returning) which occurs after forming the cylindrical tubular body can be eliminated.

本発明の他の好適例においては、図5に示すように、第一嵌合部10と第二嵌合部20との嵌合部分に、平板状体2の長手方向に沿ってカシメ部30が形成されている。かかるカシメ部30は、第一嵌合部10と第二嵌合部20との嵌合部にプレス加工を施すことにより形成される。一嵌合部10と第二嵌合部20との嵌合部分にカシメ部30を形成したことで、嵌合強度が一層向上すると共に、外観的な見栄えもよくなる。   In another preferred embodiment of the present invention, as shown in FIG. 5, a caulking portion 30 is formed on the fitting portion between the first fitting portion 10 and the second fitting portion 20 along the longitudinal direction of the flat plate-like body 2. Is formed. The crimping portion 30 is formed by pressing the fitting portion between the first fitting portion 10 and the second fitting portion 20. By forming the crimping portion 30 in the fitting portion between the one fitting portion 10 and the second fitting portion 20, the fitting strength is further improved and the appearance is also improved.

平板状体2を湾曲させ、第一嵌合部10の主嵌合部11を第二嵌合部20の嵌合切欠部21に嵌め込み、同時に第二嵌合部20の嵌合凸部24を第一嵌合部10の凹部14に夫々嵌め込むことにより、両側部a,bの位置決めを容易に行うことができる。また嵌合部同士が強固に嵌合されるので、保持作業等がなくなり、金属パイプの製造工程が削減でき、さらに安全性も確保される。   The plate-like body 2 is curved, and the main fitting portion 11 of the first fitting portion 10 is fitted into the fitting notch portion 21 of the second fitting portion 20, and the fitting convex portion 24 of the second fitting portion 20 is simultaneously fitted. By fitting into the recesses 14 of the first fitting part 10, the side parts a and b can be easily positioned. In addition, since the fitting portions are firmly fitted to each other, the holding work or the like is eliminated, the manufacturing process of the metal pipe can be reduced, and safety is ensured.

次に、本発明における金属パイプの製造方法を説明する。
本発明の金属パイプの製造方法は、第一嵌合部10と第二嵌合部20を有する平板状体2を成形する打ち抜き工程と、第一嵌合部10と第二嵌合部20の基部分を角度曲げする角度曲工程と、平板状体2を長手方向にW状に曲げるW曲工程と、W曲工程の後、平板状体2をU字状に曲げるU曲工程と、第一嵌合部10と第二嵌合部20とを嵌合させる嵌合工程と、を含むものである。
Next, the manufacturing method of the metal pipe in this invention is demonstrated.
The manufacturing method of the metal pipe of the present invention includes a punching process for forming the flat body 2 having the first fitting portion 10 and the second fitting portion 20, and the first fitting portion 10 and the second fitting portion 20. An angle bending step of bending the base portion, a W bending step of bending the flat plate-like body 2 in the longitudinal direction, a U bending step of bending the flat plate-like body 2 into a U shape after the W bending step, A fitting step of fitting the one fitting part 10 and the second fitting part 20 together.

本発明における金属パイプの製造方法の詳細を図5に示す工程(a)〜(e)に基づきを説明する。
工程(a)は、第一嵌合部10と第二嵌合部20の基部分から角度曲げする角度曲工程である。
工程(b)は、プレス加工等により、平板状体2を長手方向にW状に曲げるW曲工程である。
工程(c)は、W曲工程の後、平板状体2を両側からプレス加工等により加圧してU字状に曲げるU曲工程である。
工程(d)は、第一嵌合部10と第二嵌合部20とを嵌合させる嵌合工程である。この際、第一嵌合部10の円形部13と第二嵌合部20の嵌合凸部24とは僅かに突出した状態となる。
工程(e)は、前記嵌合工程の後、嵌合部分にカシメ加工を施すカジメ工程である。カシメ加工は、第一嵌合部10と第二嵌合部20との嵌合部にプレス加工を施すもので、カシメ加工を施すことにより、円形部13と嵌合凸部24の突出が平坦状となり、長手方向に長尺平面状のカシメ部30が形成される。かかるカシメ加工を施すことで、嵌合強度が一層向上すると共に、外観的な見栄えもよくなる。
Details of the metal pipe manufacturing method according to the present invention will be described based on the steps (a) to (e) shown in FIG.
Step (a) is an angle bending step of bending the angle from the base portions of the first fitting portion 10 and the second fitting portion 20.
Step (b) is a W-bending step in which the flat plate-like body 2 is bent into a W shape in the longitudinal direction by press working or the like.
Step (c) is a U-curving step in which, after the W-curving step, the flat plate body 2 is pressed from both sides by pressing or the like and bent into a U-shape.
Step (d) is a fitting step for fitting the first fitting portion 10 and the second fitting portion 20 together. At this time, the circular portion 13 of the first fitting portion 10 and the fitting convex portion 24 of the second fitting portion 20 are slightly projected.
Step (e) is a caulking step in which the fitting portion is crimped after the fitting step. In the caulking process, the fitting part between the first fitting part 10 and the second fitting part 20 is pressed, and the protrusion of the circular part 13 and the fitting convex part 24 is flat by performing the caulking process. A long flat crimping portion 30 is formed in the longitudinal direction. By performing the crimping process, the fitting strength is further improved and the appearance is improved.

なお、本発明の金属パイプの製造方法において、平板状体2を打ち抜き加工する打抜き工程の前、同時、若しくは後に、締結用の開孔部を形成する穿孔加工を施すことができる。   In addition, in the manufacturing method of the metal pipe of this invention, the punching process which forms the opening part for fastening can be given before the punching process which punches the flat plate-like body 2, or simultaneously.

本発明の金属パイプ製造に使用される平板状体の平面図である。It is a top view of the flat body used for metal pipe manufacture of this invention. 前記平板状体の拡大斜視図である。It is an expansion perspective view of the said flat body. 前記平板状体を接合させて形成された金属パイプの斜視図である。It is a perspective view of the metal pipe formed by joining the said flat body. 前記金属パイプの拡大部分平面図である。It is an enlarged partial top view of the said metal pipe. 本発明の金属パイプの製造方法を示す工程図である。It is process drawing which shows the manufacturing method of the metal pipe of this invention.

符号の説明Explanation of symbols

1 金属パイプ
2 平板状体
10 第一嵌合部
11 主嵌合部
12 アーム部
13 円形部
14 凹部
15 平坦部
20 第二嵌合部
21 嵌合切欠部
22 短冊状切欠部
23 円形切欠部
24 嵌合凸部
25 平坦部
30 カシメ部
a 一側面
b 他側面
DESCRIPTION OF SYMBOLS 1 Metal pipe 2 Flat body 10 1st fitting part 11 Main fitting part 12 Arm part 13 Circular part 14 Recessed part 15 Flat part 20 Second fitting part 21 Fitting notch part 22 Strip-shaped notch part 23 Circular notch part 24 Mating convex part 25 Flat part 30 Caulking part a One side b Other side

Claims (6)

矩形の平板状体を湾曲させることにより形成された金属パイプであって、
長手方向の一側面に形成された第一嵌合部と、前記一側面と対向する他側面に形成された、前記第一嵌合部と嵌合する第二嵌合部とを備えることを特徴とする金属パイプ。
A metal pipe formed by curving a rectangular flat plate,
A first fitting portion formed on one side surface in the longitudinal direction, and a second fitting portion formed on the other side surface facing the one side surface and fitted with the first fitting portion. And metal pipe.
前記第一嵌合部と第二嵌合部とは、前記平板状体の側面に夫々少なくとも1つ以上形成されている請求項1記載の金属パイプ。   The metal pipe according to claim 1, wherein at least one of the first fitting portion and the second fitting portion is formed on a side surface of the flat plate-like body. 前記第一嵌合部が、前記平板状体の一側面より突出する先方円形状の主嵌合部と、該主嵌合部の両側に形成された、平板状体の側面内側に穿設された凹部とを備え、
前記第二嵌合部が、前記平板状体の他側面内側に穿設された、前記主嵌合部が嵌入される嵌合切欠部と、嵌合切欠部の両側に形成された、前記第一嵌合部の凹部に嵌合される嵌合凸部とを備える請求項1または2記載の金属パイプ。
The first fitting portion is formed in a front circular main fitting portion protruding from one side surface of the flat plate-like body, and on the inner side surface of the flat plate body formed on both sides of the main fitting portion. And a concave portion,
The second fitting portion is formed on the other side inner side of the flat plate-like body, the fitting notch portion into which the main fitting portion is inserted, and the both sides of the fitting notch portion, The metal pipe of Claim 1 or 2 provided with the fitting convex part fitted by the recessed part of one fitting part.
前記第一嵌合部と第二嵌合部との嵌合部分に、カシメ部を形成した請求項1乃至3のうちいずれか1項に記載の金属パイプ。   The metal pipe according to any one of claims 1 to 3, wherein a caulking portion is formed at a fitting portion between the first fitting portion and the second fitting portion. 請求項1〜4のうちいずれか一項記載の金属パイプの製造方法において、
第一嵌合部と第二嵌合部を有する平板状体を成形する打ち抜き工程と、第一嵌合部と第二嵌合部の基部分を角度曲げする角度曲工程と、平板状体を長手方向にW状に曲げるW曲工程と、W曲工程の後、平板状体をU字状に曲げるU曲工程と、第一嵌合部と第二嵌合部とを嵌合させる嵌合工程と、を含むことを特徴とする金属パイプの製造方法。
In the manufacturing method of the metal pipe according to any one of claims 1 to 4,
A punching step for forming a flat plate-like body having a first fitting portion and a second fitting portion, an angle bending step for bending the base portion of the first fitting portion and the second fitting portion, and a flat plate-like body W-bending step for bending in the W shape in the longitudinal direction, U-bending step for bending the flat body into a U-shape after the W-bending step, and fitting for fitting the first fitting portion and the second fitting portion. A process for producing a metal pipe.
前記嵌合工程の後、嵌合部分にカシメ加工を施す請求項5記載の金属パイプの製造方法。   The metal pipe manufacturing method according to claim 5, wherein after the fitting step, the fitting portion is subjected to crimping.
JP2008177268A 2008-07-07 2008-07-07 Metallic pipe and manufacturing method thereof Pending JP2010012515A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086159A (en) * 2011-10-21 2013-05-13 Sakura Kogyo Kk Manufacturing method for pipe material, pipe material produced with the same method, and exhaust gas catalyst system using the pipe material as outer cylinder
JP2014161513A (en) * 2013-02-25 2014-09-08 Arai Seisakusho Co Ltd Manufacturing method of head rest stay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086159A (en) * 2011-10-21 2013-05-13 Sakura Kogyo Kk Manufacturing method for pipe material, pipe material produced with the same method, and exhaust gas catalyst system using the pipe material as outer cylinder
JP2014161513A (en) * 2013-02-25 2014-09-08 Arai Seisakusho Co Ltd Manufacturing method of head rest stay

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