JPH06210377A - Method for forming elbow by metallic pipe - Google Patents
Method for forming elbow by metallic pipeInfo
- Publication number
- JPH06210377A JPH06210377A JP2069693A JP2069693A JPH06210377A JP H06210377 A JPH06210377 A JP H06210377A JP 2069693 A JP2069693 A JP 2069693A JP 2069693 A JP2069693 A JP 2069693A JP H06210377 A JPH06210377 A JP H06210377A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- forming
- curved
- groove
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ステンレスパイプ、銅
パイプあるいは、鋼管等の金属製パイプにより曲率半径
の小さい曲がり管、つまりエルボを成形する金属製パイ
プによるエルボの成形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 forming an elbow with a bent pipe having a small radius of curvature, that is, an elbow made of a metal pipe such as a stainless pipe, a copper pipe, or a steel pipe.
【０００２】[0002]
【従来の技術】従来の技術として、図６に示すように、
所定の寸法に切断されたステンレス製のパイプ１の長手
方向中間部１ａをパイプベンダ２により湾曲させるよう
にしたものがあった。即ち、上記パイプベンダ２は、外
周に断面半円弧状の溝３ａが形成された大径の成形ロー
ル３の軸心部に、ピン５を介してアーム６を回動可能に
連結し、このアーム６の長手方向中間部に外周に断面半
円弧状の溝４ａが形成された小径の加圧ロール４をピン
７により回転自在に連結するとともに、該加圧ロール４
を上記成形ロール３に外接させてなり、上記成形ロール
３および加圧ロール４の各溝３ａ，４ａ間に直管状のパ
イプ１を挿通するとともに、その左端部をストッパー８
に係止し、アーム６を介して加圧ロール４を図６におい
て矢印（ア）方向に回動させ、上記パイプ１の長手方向
中間部を成形ロール３の溝３ａに沿って湾曲させ、図７
に示すような湾曲パイプ１−１を形成する。2. Description of the Related Art As a conventional technique, as shown in FIG.
There has been a pipe bender 2 in which a longitudinal middle portion 1a of a stainless steel pipe 1 cut into a predetermined size is curved. That is, in the pipe bender 2, an arm 6 is rotatably connected to a shaft center portion of a large-diameter forming roll 3 having a groove 3a having a semicircular cross section on its outer periphery via a pin 5 so that the arm 6 can rotate. A pressure roller 4 having a small diameter and having a groove 4a having a semicircular arc shape in the outer periphery is formed at an intermediate portion in the longitudinal direction of 6 by a pin 7 so as to be rotatably connected to the pressure roller 4.
Is circumscribed on the forming roll 3 and the straight pipe 1 is inserted between the grooves 3a and 4a of the forming roll 3 and the pressure roll 4, and the left end portion of the pipe 1 is covered by a stopper 8
6, the pressure roll 4 is rotated in the direction of the arrow (a) in FIG. 6 via the arm 6, and the longitudinal middle portion of the pipe 1 is curved along the groove 3a of the forming roll 3, 7
The curved pipe 1-1 as shown in FIG.
【０００３】[0003]
【発明が解決しようとする課題】上記従来のものは、パ
イプ１を成形ロール３および加圧ロール４により挾持し
て湾曲させるため、その軸線Ｌの曲率半径Ｒをパイプ１
の直径寸法Ｄよりも小さくすることができず、配管のス
ペースが増大する欠点があった。これの対策として一対
のパイプの端面を軸線に対して例えば４５度の角度で切
断し、各端面同士を溶接により接続することにより、曲
率半径の小さい金属パイプ製のエルボを形成する手段が
あるが、これは高度の溶接技術を要するとともに、生産
性が乏しくなる欠点がある。本発明は上記欠点を解消し
た新規な金属製パイプによるエルボの成形方法を得るこ
とを目的とする。In the above-mentioned conventional apparatus, since the pipe 1 is clamped and curved by the forming roll 3 and the pressure roll 4, the radius of curvature R of the axis L of the pipe 1 is set.
It cannot be made smaller than the diameter dimension D, and there is a drawback that the space of the pipe increases. As a countermeasure against this, there is a means for forming an elbow made of a metal pipe having a small radius of curvature by cutting the end faces of a pair of pipes at an angle of, for example, 45 degrees with respect to the axis and connecting the end faces with each other by welding. However, this requires a high level of welding technology and has a drawback that productivity becomes poor. An object of the present invention is to obtain a new method for forming an elbow with a metal pipe, which solves the above-mentioned drawbacks.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記目的を達
成するために以下の如く構成したものである。即ち、金
属製のパイプの長手方向中間部を該パイプの軸線の曲率
半径がパイプの直径以上となる曲率半径で湾曲させ、長
手方向中間部の曲率半径が前記パイプの直径と略等しい
曲率半径で谷形に湾曲しかつ前記パイプの半周部を嵌合
する断面半円弧状の成形溝を有する型を設け、該型の成
形溝に前記湾曲された湾曲パイプを嵌合させるとともに
該湾曲パイプの長手方向両端部をクランプにより成形溝
の両端部に押圧係止し、先端部が前記成形溝の湾曲部の
長手方向一方の曲率半径と略等しい円弧面に形成された
一対の棒状の成形ロッドと、前記成形溝の中間部に対面
する山形に湾曲しかつ前記パイプの半周部を嵌合する断
面半円弧状の嵌合溝を有する成形パンチとを設け、前記
各成形ロッドを湾曲パイプの両端に嵌合させて長手方向
中心部に向けて移動させるとともに、前記成形パンチに
より湾曲パイプの長手方向中間部を成形溝の長手方向中
間部に向けて押圧屈曲させる構成にしたものである。The present invention is configured as follows to achieve the above object. That is, the longitudinal middle portion of the metal pipe is curved with a radius of curvature such that the radius of curvature of the axis of the pipe is equal to or larger than the diameter of the pipe, and the longitudinal middle portion has a radius of curvature substantially equal to the diameter of the pipe. A mold having a groove having a semi-arcuate cross-section that is curved in a valley shape and fits a semi-circumferential portion of the pipe is provided, and the curved pipe is fitted into the molding groove of the mold and the length of the curved pipe is long. A pair of rod-shaped forming rods, in which both ends in the direction are pressed and locked to both ends of the forming groove by a clamp, and the tip end portion is formed into an arc surface approximately equal to the radius of curvature of one longitudinal direction of the curved portion of the forming groove, A forming punch having a fitting groove curved in a mountain shape facing the middle portion of the forming groove and having a semicircular arc cross section for fitting the semi-circular portion of the pipe is provided, and the forming rods are fitted to both ends of the curved pipe. In the center of the longitudinal direction Only with moving, it is obtained by the configuration in which the pressing bent toward the longitudinally intermediate portion of the curved pipe in the longitudinal direction intermediate portion of the molding groove by the forming punch.
【０００５】[0005]
【実施例】以下本発明の実施例を図面に基いて説明す
る。図面において、図１〜図４は本発明による主な製造
工程を示す。まず図１に示すように、所定の寸法に切断
されたステンレス製のパイプ１の左右（長手）方向中間
部１ａをパイプベンダ２により湾曲させ、図２に示すよ
うに、左右（長手）方向中間部１ａの軸線Ｌの曲率半径
Ｒがパイプ１の直径寸法Ｄと略等しく、また、左右端部
１ｂ，１ｃの交叉角度αが例えば９０度となる湾曲パイ
プ１−１を形成する。この湾曲パイプ１−１の形成は、
前述した従来と同様にして形成する。なお、図１および
図２中、図６および図７と同符号の部分は、該図６およ
び図７と同構造なのでその説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show the main manufacturing steps according to the present invention. First, as shown in FIG. 1, the left and right (longitudinal) direction intermediate portion 1a of a stainless steel pipe 1 cut into a predetermined size is bent by a pipe bender 2, and as shown in FIG. The radius R of curvature of the axis L of the portion 1a is substantially equal to the diameter dimension D of the pipe 1, and the curved pipe 1-1 is formed such that the intersection angle α of the left and right end portions 1b and 1c is, for example, 90 degrees. The formation of this curved pipe 1-1 is
It is formed in the same manner as the above-mentioned conventional method. In FIGS. 1 and 2, the same reference numerals as those in FIGS. 6 and 7 have the same structure as those in FIGS. 6 and 7, and therefore the description thereof will be omitted.
【０００６】次いで、上記湾曲パイプ１−１を、図３に
示すように、型１０の上面に左右方向に細長く形成した
側面視谷形の成形溝１１に嵌合係止する。この成形溝１
１は、左右（長手）方向中間部１１ａの底面の曲率半径
Ｒ１を湾曲パイプ１−１の直径寸法Ｄと略等しく、かつ
左右端部１１ｂ，１１ｃの交叉角度βを、前述した湾曲
パイプ１−１の左右端部１ｂ，１ｃの交叉角度αと等角
度（９０度）に形成し、また断面形状はパイプ１−１の
下半周部を嵌合する半円弧状に形成してなり、この成形
溝１１に湾曲パイプ１−１をその左右方向中間部１ａを
下向きにして嵌合係止する。Next, as shown in FIG. 3, the curved pipe 1-1 is fitted and locked in a molding groove 11 formed in an elongated shape in the left-right direction on the upper surface of the mold 10 and having a valley shape in a side view. This forming groove 1
1, the curvature radius R1 of the bottom surface of the left-right (longitudinal) direction intermediate portion 11a is substantially equal to the diameter dimension D of the curved pipe 1-1, and the intersection angle β of the left and right end portions 11b and 11c is the curved pipe 1- 1 is formed at an angle (90 degrees) with the crossing angle α of the left and right ends 1b and 1c of the pipe 1, and the cross-sectional shape is formed into a semi-circular shape that fits the lower half of the pipe 1-1. The curved pipe 1-1 is fitted and locked in the groove 11 with the left-right direction intermediate portion 1a thereof facing downward.
【０００７】次いで上記湾曲パイプ１−１の左右（長手
方向）両端部１ｂ，１ｃを左右一対のクランプ１２によ
り成形溝１１の左右両端部１１ｂ，１１ｃに押圧係止す
る。このクランプ１２は、下部に湾曲パイプ１−１の左
右端部１ｂ，１ｃの上半周部を嵌合する断面半円弧状の
保持溝１２ａを有し、第１シリンダ１３により下方に移
動されて保持溝１２ａで湾曲パイプ１−１の左右端部１
ｂ，１ｃの上半周部を嵌合し、該左右端部１ｂ，１ｃを
成形溝１１の左右両端部１１ｂ，１１ｃに押圧係止す
る。Next, the left and right (longitudinal direction) end portions 1b and 1c of the curved pipe 1-1 are pressed and locked to the left and right end portions 11b and 11c of the molding groove 11 by a pair of left and right clamps 12. The clamp 12 has a holding groove 12a having a semi-circular cross section, which fits the upper half portions of the left and right end portions 1b and 1c of the curved pipe 1-1 in the lower portion, and is moved and held downward by the first cylinder 13. Left and right ends 1 of the curved pipe 1-1 in the groove 12a
The upper half portions of b and 1c are fitted, and the left and right end portions 1b and 1c are pressed and locked to the left and right end portions 11b and 11c of the molding groove 11.
【０００８】上記成形溝１１の左右両端部１１ｂ，１１
ｃに一対の棒状の成形ロッド１４を互いに対向させて配
置し、第２シリンダ１５により上記左右両端部１１ｂ，
１１ｃに沿って対向方向に移動させる。上記成形ロッド
１４は、対向側の各先端部１４ａの下面を成形溝１１の
左右方向中間部１１ａの一方の底面の曲率半径Ｒ１と略
等しい円弧面に形成する。また、上記成形溝１１の中間
部１１ａの上方に、下部に嵌合溝１７を有する成形パン
チ１６を配置し、第３シリンダ１８により上下方向に移
動させる。上記嵌合溝１７は、成形溝１１の中間部１１
ａと対面する山形に湾曲しかつ左右（長手）方向中間部
の底面１７ａの曲率半径を２mm〜３mmに形成し、さらに
断面はパイプ１−１の上半周部を嵌合する半円弧状に形
成する。Left and right ends 11b, 11 of the molding groove 11
A pair of rod-shaped forming rods 14 are arranged to face each other in c, and the right and left end portions 11b, 11b
11c is moved in the opposite direction. The forming rod 14 has the lower surface of each tip 14a on the opposite side formed into an arc surface substantially equal to the radius of curvature R1 of one bottom surface of the left-right direction intermediate portion 11a of the forming groove 11. Further, the forming punch 16 having the fitting groove 17 in the lower portion is arranged above the intermediate portion 11a of the forming groove 11 and is moved vertically by the third cylinder 18. The fitting groove 17 is the intermediate portion 11 of the molding groove 11.
It is curved in a mountain shape facing a and has a radius of curvature of a bottom surface 17a at an intermediate portion in the left-right (longitudinal) direction of 2 mm to 3 mm, and its cross section is formed in a semi-arc shape that fits the upper half of the pipe 1-1. To do.
【０００９】そして、図３および図４に示すように、各
第２シリンダ１５により各成形ロッド１４を同期させて
左右方向中心部方向に移動させ、各成形ロッド１４を左
右外側方から湾曲パイプ１−１の左右両端部１ｂ，１ｃ
に嵌合させるとともに、第３シリンダ１８により成形パ
ンチ１６を下方に移動させ、湾曲パイプ１−１の左右方
向中間部１ａを成形溝１１の左右方向中間部１１ａに沿
って押圧屈曲、即ち絞り成形し、図５に示すように、中
間部２０ａの下面の曲率半径Ｒ２がパイプ１−１の径Ｄ
と等しく、かつ中間部２０ａの上面の曲率半径が２mm〜
３mmとなるエルボ２０を形成する。As shown in FIGS. 3 and 4, the second cylinders 15 synchronize the molding rods 14 to move the molding rods 14 toward the center in the left-right direction. Left and right ends 1b and 1c of -1
And the molding punch 16 is moved downward by the third cylinder 18 to press the left-right intermediate portion 1a of the bending pipe 1-1 along the left-right intermediate portion 11a of the forming groove 11, that is, draw forming. Then, as shown in FIG. 5, the radius of curvature R2 of the lower surface of the intermediate portion 20a is equal to the diameter D of the pipe 1-1.
And the radius of curvature of the upper surface of the intermediate portion 20a is 2 mm to
An elbow 20 having a size of 3 mm is formed.
【００１０】[0010]
【発明の効果】以上の説明から明らかな如く、本発明に
よれば、屈曲部の曲率半径が小さくなるので、該屈曲部
の近接位置に取付け用のフランジを設けることができ、
小さなスペース内に配管することができる。特に自動車
用エンジンのエキゾーストマニホールド、インテークマ
ニホールド等をステンレス等の耐熱金属製パイプ材によ
り形成することができ、軽量化に適することになる。ま
た、金属製のパイプ材を湾曲および絞り成形して曲率半
径の小さいエルボを形成するようにしたので、生産性に
富み、安価になる等の効果を奏する。As is apparent from the above description, according to the present invention, since the radius of curvature of the bent portion becomes small, a mounting flange can be provided at a position near the bent portion.
Can be piped in a small space. In particular, exhaust manifolds, intake manifolds, etc. of automobile engines can be formed from pipe materials made of heat-resistant metal such as stainless steel, which is suitable for weight reduction. Moreover, since the elbow having a small radius of curvature is formed by bending and drawing a metal pipe material, it is possible to obtain effects such as high productivity and low cost.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の第１工程を示す側面図である。FIG. 1 is a side view showing a first step of the present invention.
【図２】本発明の第１工程により形成された湾曲パイプ
の側面図である。FIG. 2 is a side view of a curved pipe formed by the first step of the present invention.
【図３】本発明の第２工程を示す側断面図である。FIG. 3 is a side sectional view showing a second step of the present invention.
【図４】本発明の第３工程を示す側断面図である。FIG. 4 is a side sectional view showing a third step of the present invention.
【図５】本発明の第３工程により形成されたエルボの側
面図である。FIG. 5 is a side view of an elbow formed by the third step of the present invention.
【図６】従来の工程を示す側面図である。FIG. 6 is a side view showing a conventional process.
【図７】従来の工程により形成された湾曲パイプの側面
図である。FIG. 7 is a side view of a curved pipe formed by a conventional process.
【図８】[Figure 8]
１ パイプ １ａ 左右（長手）方向中間部 １ｂ 左端部 １ｃ 右端部 １−１ 湾曲パイプ ２ パイプベンダ ３ 成形ロール ３ａ 溝 ４ 加圧ロール ４ａ 溝 ５ ピン ６ アーム ７ ピン ８ ストッパー １０ 型 １１ 成形溝 １１ａ 左右（長手）方向中間部 １１ｂ 左端部 １１ｃ 右端部 １２ クランプ １２ａ 保持溝 １３ 第１シリンダ １４ 成形ロッド １４ａ 先端部 １５ 第２シリンダ １６ 成形パンチ １７ 嵌合溝 １７ａ 左右（長手）方向中間部 １８ 第３シリンダ ２０ エルボ ２０ａ 中間部 1 Pipe 1a Left-right (longitudinal) direction middle part 1b Left end part 1c Right end part 1-1 Curved pipe 2 Pipe bender 3 Forming roll 3a groove 4 Pressure roll 4a groove 5 pin 6 Arm 7 pin 8 Stopper 10 Type 11 Forming groove 11a Left and right (Longitudinal) direction middle part 11b Left end part 11c Right end part 12 Clamp 12a Holding groove 13 First cylinder 14 Forming rod 14a Tip part 15 Second cylinder 16 Forming punch 17 Fitting groove 17a Left and right (longitudinal) direction middle part 18 Third cylinder 20 Elbow 20a Middle part
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【手続補正書】[Procedure amendment]
【提出日】平成５年７月１６日[Submission date] July 16, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の第１工程を示す側面図である。FIG. 1 is a side view showing a first step of the present invention.
【図２】本発明の第１工程により形成された湾曲パイプ
の側面図である。FIG. 2 is a side view of a curved pipe formed by the first step of the present invention.
【図３】本発明の第２工程を示す側断面図である。FIG. 3 is a side sectional view showing a second step of the present invention.
【図４】本発明の第３工程を示す側断面図である。FIG. 4 is a side sectional view showing a third step of the present invention.
【図５】本発明の第３工程により形成されたエルボの側
面図である。FIG. 5 is a side view of an elbow formed by the third step of the present invention.
【図６】従来の工程を示す側面図である。FIG. 6 is a side view showing a conventional process.
【図７】従来の工程により形成された湾曲パイプの側面
図である。FIG. 7 is a side view of a curved pipe formed by a conventional process.
【符号の説明】 １ パイプ １ａ 左右（長手）方向中間部 １ｂ 左端部 １ｃ 右端部 １−１ 湾曲パイプ ２ パイプベンダ ３ 成形ロール ３ａ 溝 ４ 加圧ロール ４ａ 溝 ５ ピン ６ アーム ７ ピン ８ ストッパー １０ 型 １１ 成形溝 １１ａ 左右（長手）方向中間部 １１ｂ 左端部 １１ｃ 右端部 １２ クランプ １２ａ 保持溝 １３ 第１シリンダ １４ 成形ロッド １４ａ 先端部 １５ 第２シリンダ １６ 成形パンチ １７ 嵌合溝 １７ａ 左右（長手）方向中間部 １８ 第３シリンダ ２０ エルボ ２０ａ 中間部[Explanation of reference numerals] 1 pipe 1a left-right (longitudinal) direction intermediate portion 1b left end portion 1c right end portion 1-1 curved pipe 2 pipe bender 3 forming roll 3a groove 4 pressure roll 4a groove 5 pin 6 arm 7 pin 8 stopper 10 type 11 Forming Groove 11a Left-Right (Longitudinal) Direction Middle Part 11b Left End 11c Right End 12 Clamp 12a Holding Groove 13 First Cylinder 14 Forming Rod 14a Tip 15 Second Cylinder 16 Forming Punch 17 Fitting Groove 17a Left-right (longitudinal) Direction Middle Part 18 Third Cylinder 20 Elbow 20a Middle Part
Claims (1)
イプの軸線の曲率半径がパイプの直径以上となる曲率半
径で湾曲させ、長手方向中間部の曲率半径が前記パイプ
の直径と略等しい曲率半径で谷形に湾曲しかつ前記パイ
プの半周部を嵌合する断面半円弧状の成形溝を有する型
を設け、該型の成形溝に前記湾曲された湾曲パイプを嵌
合させるとともに該湾曲パイプの長手方向両端部をクラ
ンプにより成形溝の両端部に押圧係止し、先端部が前記
成形溝の湾曲部の長手方向一方の曲率半径と略等しい円
弧面に形成された一対の棒状の成形ロッドと、前記成形
溝の中間部に対面する山形に湾曲しかつ前記パイプの半
周部を嵌合する断面半円弧状の嵌合溝を有する成形パン
チとを設け、前記各成形ロッドを湾曲パイプの両端に嵌
合させて長手方向中心部に向けて移動させるとともに、
前記成形パンチにより湾曲パイプの長手方向中間部を成
形溝の長手方向中間部に向けて押圧屈曲させたことを特
徴とする金属製パイプによるエルボの成形方法。1. A longitudinal section of a metal pipe is curved with a radius of curvature such that an axis of the pipe has a radius of curvature equal to or larger than a diameter of the pipe, and a longitudinal middle section has a radius of curvature substantially equal to a diameter of the pipe. A mold having a molding groove curved in a valley shape with a radius of curvature and having a semicircular arc cross section for fitting the semi-circular portion of the pipe is provided, and the curved pipe is fitted in the molding groove of the mold and the bending is performed. A pair of rod-shaped moldings in which both ends of the pipe in the longitudinal direction are pressed and locked to both ends of the molding groove by clamps, and the tip end is formed into an arc surface approximately equal to the radius of curvature of one of the curved portions of the molding groove in the longitudinal direction. A rod and a forming punch having a fitting groove curved in a mountain shape facing the intermediate portion of the forming groove and having a semicircular arc cross section for fitting the half peripheral portion of the pipe are provided, and each forming rod is formed into a curved pipe. Fitted on both ends and in the longitudinal direction While moving toward the heart,
A method for forming an elbow with a metal pipe, characterized in that the middle portion of the curved pipe in the longitudinal direction is pressed and bent toward the middle portion of the forming groove by the forming punch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5020696A JP2517830B2 (en) | 1993-01-13 | 1993-01-13 | Elbow molding method using metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5020696A JP2517830B2 (en) | 1993-01-13 | 1993-01-13 | Elbow molding method using metal pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06210377A true JPH06210377A (en) | 1994-08-02 |
| JP2517830B2 JP2517830B2 (en) | 1996-07-24 |
Family
ID=12034323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5020696A Expired - Lifetime JP2517830B2 (en) | 1993-01-13 | 1993-01-13 | Elbow molding method using metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2517830B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062519A (en) * | 1999-08-25 | 2001-03-13 | Toyota Motor Corp | Metallic pipe bending method and bent metallic pipe |
| JP2002239639A (en) * | 2001-02-14 | 2002-08-27 | Sankei Kogyo Kk | Method and device for bending pipe |
| KR100373490B1 (en) * | 2000-11-15 | 2003-02-25 | 서도장 | heating pression forming apparatus of the sock-absorbing for packing used paper pipe |
| JP2006263750A (en) * | 2005-03-22 | 2006-10-05 | Calsonic Kansei Corp | Pipe manufacturing method |
| JP2007030005A (en) * | 2005-07-28 | 2007-02-08 | Kunitekku:Kk | Pipe and method for manufacturing pipe |
| KR101638749B1 (en) * | 2015-12-02 | 2016-07-11 | 이광섭 | Method for manufacturing elbow used in connecting high pressure pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719114A (en) * | 1980-07-09 | 1982-02-01 | Hitachi Ltd | Method for forming hydraulic bulge of elbow |
| JPH01153812U (en) * | 1988-04-15 | 1989-10-23 | ||
| JPH0217251A (en) * | 1988-07-04 | 1990-01-22 | Iseki & Co Ltd | Installing device of transmission case |
-
1993
- 1993-01-13 JP JP5020696A patent/JP2517830B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719114A (en) * | 1980-07-09 | 1982-02-01 | Hitachi Ltd | Method for forming hydraulic bulge of elbow |
| JPH01153812U (en) * | 1988-04-15 | 1989-10-23 | ||
| JPH0217251A (en) * | 1988-07-04 | 1990-01-22 | Iseki & Co Ltd | Installing device of transmission case |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001062519A (en) * | 1999-08-25 | 2001-03-13 | Toyota Motor Corp | Metallic pipe bending method and bent metallic pipe |
| KR100373490B1 (en) * | 2000-11-15 | 2003-02-25 | 서도장 | heating pression forming apparatus of the sock-absorbing for packing used paper pipe |
| JP2002239639A (en) * | 2001-02-14 | 2002-08-27 | Sankei Kogyo Kk | Method and device for bending pipe |
| JP2006263750A (en) * | 2005-03-22 | 2006-10-05 | Calsonic Kansei Corp | Pipe manufacturing method |
| JP2007030005A (en) * | 2005-07-28 | 2007-02-08 | Kunitekku:Kk | Pipe and method for manufacturing pipe |
| KR101638749B1 (en) * | 2015-12-02 | 2016-07-11 | 이광섭 | Method for manufacturing elbow used in connecting high pressure pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2517830B2 (en) | 1996-07-24 |
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