JP2009233709A - Extrusion bending apparatus - Google Patents

Extrusion bending apparatus Download PDF

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JP2009233709A
JP2009233709A JP2008083547A JP2008083547A JP2009233709A JP 2009233709 A JP2009233709 A JP 2009233709A JP 2008083547 A JP2008083547 A JP 2008083547A JP 2008083547 A JP2008083547 A JP 2008083547A JP 2009233709 A JP2009233709 A JP 2009233709A
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mandrel
bent
divided
bending
hole
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Nobuyuki Degashira
延之 出頭
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IHI Corp
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IHI Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an extrusion bending apparatus enabling a pipe material to be extruded and bent into a complicated shape and a weld part to be reduced. <P>SOLUTION: In the extrusion bend processing apparatus 1, a straight hole 3 and a bent hole 4 are formed at an outer frame 5, the latter of which is provided with a mandrel 6, and the pipe material 2 is inserted into the straight hole 3 and bent by extruding it into the bent hole 4 by an extrusion device 7. The mandrel 6 is formed of a plurality of division parts 16 from its top end to its rear end, and a flexible wire 18 is connected with the division part 16 at the leading end. The flexible wire 18 is inserted into a rear division part 16 and extended to the division part 16 at the rear most end, the mandrel 6 comprising these division parts 16 is located at the bent hole 4, and its leading end is located at the predetermined position of the bent hole 4. Respective division parts 16 are tightly connected to form the mandrel 6 by applying copressed force to each division part 16 at the flexible wire 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、管材を押出曲げ加工する押出し曲げ加工装置に関する。   The present invention relates to an extrusion bending apparatus for extrusion bending a pipe material.

図10及び図11に示すように、押出曲げ加工装置30は、管材2を収容する直穴部3を有すると共に直穴部3に連結して形成された曲げ穴部4を有する外枠31と、曲げ穴部4内に設けられ管材2内に嵌合するマンドレル32と、直穴部3内の管材2を曲げ穴部4に押し出すための押出装置7とを備えて構成されている。   As shown in FIGS. 10 and 11, the extrusion bending apparatus 30 includes an outer frame 31 having a straight hole portion 3 that accommodates the pipe material 2 and a bent hole portion 4 that is formed by being connected to the straight hole portion 3. A mandrel 32 provided in the bent hole portion 4 and fitted in the tube material 2 and an extrusion device 7 for extruding the tube material 2 in the straight hole portion 3 to the bent hole portion 4 are configured.

この押出曲げ加工装置30によれば、原子力発電所等で用いられる外径数百mmの配管であっても確実に曲げ加工することができる。   According to this extrusion bending apparatus 30, even a pipe having an outer diameter of several hundred mm used in a nuclear power plant or the like can be reliably bent.

特開2002−113524号公報JP 2002-113524 A

ところで、原子力発電所等で用いられる配管は、運転中の溶接部検査を無くす目的で溶接部を可能な限り削減することが要求される。しかしながら、上述の押出曲げ加工装置30は、マンドレル32が曲げ穴部4に沿ったフック状に形成され、かつ、マンドレル32は管材2を曲げ加工したあと管材2から引き抜かなければならないため、図12(a)に示すような直管部33の一端側に曲げ管部34が形成された略J字状の配管35しか製造できず、例えば図12(b)に示すような曲げ管部34の両端に直管部33が形成された略L字状の配管36は製造できないという課題があった。このため、J字状の配管35を製造した後、この配管35の曲げ管部34に直管を溶接にて取り付けなければならず、溶接部を削減できないという課題があった。   By the way, piping used in nuclear power plants and the like is required to reduce the number of welds as much as possible for the purpose of eliminating weld inspection during operation. However, in the above-described extrusion bending apparatus 30, the mandrel 32 is formed in a hook shape along the bending hole portion 4, and the mandrel 32 must be pulled out from the tube material 2 after bending the tube material 2. Only a substantially J-shaped pipe 35 in which a bent pipe part 34 is formed on one end side of the straight pipe part 33 as shown in (a) can be manufactured. For example, the bent pipe part 34 as shown in FIG. There was a problem that the substantially L-shaped pipe 36 in which the straight pipe portions 33 were formed at both ends could not be manufactured. For this reason, after manufacturing the J-shaped pipe 35, a straight pipe has to be attached to the bent pipe part 34 of the pipe 35 by welding, and there is a problem that the number of welds cannot be reduced.

そこで、本発明の目的は、上記課題を解決し、管材を複雑な形状に押出曲げ加工でき、溶接部を削減することができる押出曲げ加工装置を提供することにある。   Then, the objective of this invention is providing the extrusion bending apparatus which can solve the said subject, can extrude-bend a pipe material to a complicated shape, and can reduce a welding part.

上記課題を解決するために本発明は、外枠に、曲げ加工する管材を収容する直穴部と、その直穴部に連結して管材を曲げ加工する曲げ穴部とを形成し、その曲げ穴部に曲げ加工する管材の変形を防止すべく管材内に嵌合すると共に曲げ穴部に沿って曲げられたマンドレルを設け、上記外枠の直穴部に管材を挿入し、この管材を押出装置にて曲げ穴部に押し出して曲げ加工する押出曲げ加工装置において、上記マンドレルを、その先端から後端にかけて複数の分割パーツで形成し、その先端の分割パーツにフレキシブルワイヤを連結すると共にそのフレキシブルワイヤを後方の分割パーツを挿通して最後端の分割パーツまで延出させ、これら分割パーツからなるマンドレルを上記曲げ穴部に位置させると共に、その先端を曲げ穴部の所定位置に位置させ、かつ、上記フレキシブルワイヤにて各分割パーツに圧縮力を作用させて各分割パーツを密に連結してマンドレルとしたものである。   In order to solve the above-mentioned problems, the present invention forms a straight hole portion that accommodates a pipe material to be bent and a bending hole portion that bends the pipe material by being connected to the straight hole portion in the outer frame. In order to prevent deformation of the pipe material bent into the hole, a mandrel that is fitted into the pipe and bent along the bent hole is provided, and the pipe is inserted into the straight hole of the outer frame, and the pipe is extruded. In an extrusion bending apparatus that extrudes and bends into a bending hole with an apparatus, the mandrel is formed of a plurality of divided parts from the front end to the rear end, and a flexible wire is connected to the divided part at the front end and the flexible The wire is inserted through the rear split part and extended to the rearmost split part, and the mandrel consisting of these split parts is positioned in the bending hole, and the tip is placed at a predetermined position of the bending hole. It is location, and is obtained by the mandrel in close connecting each divided part by applying a compressive force to the divided parts in the flexible wire.

上記分割パーツのそれぞれに索を連結し、曲げ加工後の管材内から上記マンドレルを引き抜くとき、基端側の分割パーツから順に引くように上記索を引いてマンドレルを分解しながら引き抜くようにするとよい。   When connecting the cord to each of the divided parts and pulling out the mandrel from the bent pipe, it is better to pull out the mandrel while disassembling the mandrel by pulling the cord so that it is pulled in order from the divided parts on the base end side. .

上記分割パーツには、隣接する分割パーツと係脱可能に嵌合すると共に隣接するパーツの捻れ方向の移動を規制する嵌合部が形成されるとよい。   The split part may be formed with a fitting part that detachably engages with an adjacent split part and restricts movement of the adjacent part in the twisting direction.

上記嵌合部は、隣接する2つの分割パーツの一方に形成された雄嵌合部と、他方の分割パーツに形成され上記雄嵌合部と嵌合される雌嵌合部とを備え、上記雄嵌合部には、径方向に延びる羽根部が形成されるとよい。   The fitting portion includes a male fitting portion formed on one of two adjacent divided parts, and a female fitting portion formed on the other divided part and fitted to the male fitting portion, The male fitting portion may be formed with a blade portion extending in the radial direction.

本発明によれば、管材を複雑な形状に押出曲げ加工でき、溶接部を削減することができる。   According to the present invention, the pipe material can be extruded and bent into a complicated shape, and the number of welds can be reduced.

本発明の好適実施の形態を添付図面を用いて説明する。   Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

図1及び図2に示すように、押出曲げ加工装置1は、曲げ加工する管材2を収容する第1直穴部3と、第1直穴部3に連結して管材2を曲げ加工する曲げ穴部4と、曲げ穴部4に連結して配管2を直線状に加工する第2直穴部27とを有する外枠5と、曲げ穴部4内に設けられ曲げ加工する管材2の変形を防止すべく管材2内に嵌合するマンドレル6と、第1直穴部3内の管材2を曲げ穴部4に押し出すための押出装置7とを備えて構成される。   As shown in FIGS. 1 and 2, the extrusion bending apparatus 1 includes a first straight hole portion 3 that houses a pipe material 2 to be bent, and a bending that is connected to the first straight hole portion 3 to bend the pipe material 2. Deformation of the outer frame 5 having the hole portion 4 and the second straight hole portion 27 that is connected to the bending hole portion 4 to process the pipe 2 in a straight line, and the tube material 2 that is provided in the bending hole portion 4 and is bent. In order to prevent this, a mandrel 6 fitted into the tube material 2 and an extrusion device 7 for pushing the tube material 2 in the first straight hole portion 3 into the bending hole portion 4 are configured.

外枠5は、二つ割りに分割可能に形成されたブロック状の雌型からなる。外枠5のそれぞれの分割面8には、第1直穴部3と曲げ穴部4と第2直穴部27を半割にした形状の溝9が形成されており、外枠5を分割することで曲げ穴部4内の管材2を取り出せるようになっている。第1直穴部3は、一端を外枠5の外方に向けて開口されると共に他端を曲げ穴部4に連結されている。曲げ穴部4は、一端を第1直穴部3の他端に連結されると共に、他端を第2直穴部27の一端に連結されている。第2直穴部27は、一端を曲げ穴部4の他端に連結されると共に、他端を外枠5の外方に向けて開口されている。   The outer frame 5 is formed of a block-shaped female mold formed so as to be split into two. Each dividing surface 8 of the outer frame 5 is formed with a groove 9 having a shape in which the first straight hole portion 3, the bent hole portion 4, and the second straight hole portion 27 are halved, and the outer frame 5 is divided. By doing so, the pipe material 2 in the bending hole 4 can be taken out. The first straight hole portion 3 is opened with one end facing the outside of the outer frame 5, and the other end is connected to the bending hole portion 4. The bent hole portion 4 has one end connected to the other end of the first straight hole portion 3 and the other end connected to one end of the second straight hole portion 27. The second straight hole portion 27 is connected at one end to the other end of the bending hole portion 4 and opened at the other end toward the outside of the outer frame 5.

押出装置7は、第1直穴部3の開口10に臨んで設けられており、第1直穴部3内に挿入される押出アーム11と、押出アーム11を第1直穴部3に挿抜する方向に駆動する駆動部(図示せず)とを有する。   The extrusion device 7 is provided facing the opening 10 of the first straight hole portion 3, and the push-out arm 11 inserted into the first straight hole portion 3 and the push-out arm 11 are inserted into and removed from the first straight hole portion 3. And a drive unit (not shown) for driving in the direction of movement.

図1、図5及び図6に示すように、マンドレル6は、第2直穴部27の開口12に臨んで配設され、外枠5外の支柱などの固定系(図示せず)に着脱可能に固定される基端部13を有する。マンドレル6は、基端部13から直線状に延び第2直穴部27内に収容される直線部14と、直線部14の先端から曲げ穴部4に沿って曲げられた屈曲部15とを有する。また、マンドレル6は、その先端から基端(後端)にかけて複数の分割パーツ16を連結して構成される。   As shown in FIGS. 1, 5, and 6, the mandrel 6 is disposed facing the opening 12 of the second straight hole portion 27, and is attached to and detached from a fixing system (not shown) such as a column outside the outer frame 5. It has a proximal end 13 that can be fixed. The mandrel 6 includes a straight portion 14 that extends linearly from the base end portion 13 and is accommodated in the second straight hole portion 27, and a bent portion 15 that is bent along the bent hole portion 4 from the tip of the straight portion 14. Have. Further, the mandrel 6 is configured by connecting a plurality of divided parts 16 from the front end to the base end (rear end).

分割パーツ16は、成形する配管形状に応じて所定の形状に屈曲形成された棒体を長手方向に複数分割した形状に形成されている。分割パーツ16のうち、先端に位置される先端パーツ17は、先端側を半球状に形成されると共に基端側を棒体の中心軸方向と直交する略平面に形成される。また、先端パーツ17の基端側の中央には、フレキシブルワイヤ18の一端が連結される。分割パーツ16のうち、先端パーツ17と基端部13との間に位置される中間パーツ19は、中心にフレキシブルワイヤ18を挿通させるように筒状に形成される。中間パーツ19は、曲げ加工後の管材2内からマンドレル6を引き抜くとき、一つずつ分割して引き抜くように形成されており、それぞれの中間パーツ19には、引き抜き用の索20の一端が連結される。索20は加工時の熱に耐えるものであればよく、例えばワイヤやチェーンからなるとよい。索20の他端には、連結される分割パーツ16を示す識別部(図示せず)が設けられるとよい。識別部は、番号等が記載された札であってもよく、索20の他端に色彩を施してなるものであってよい。また特に、屈曲部15を構成する中間パーツ19は、その屈曲中心Oを中心とする分割面21間の角度θが均等となるように分割される。   The divided parts 16 are formed in a shape obtained by dividing a rod body bent into a predetermined shape in accordance with the shape of the pipe to be formed into a plurality of parts in the longitudinal direction. Of the divided parts 16, the tip part 17 positioned at the tip is formed in a hemispherical shape on the tip side, and is formed on a substantially flat surface perpendicular to the central axis direction of the rod body on the base side. One end of the flexible wire 18 is connected to the center of the distal end part 17 on the proximal end side. Of the divided parts 16, the intermediate part 19 positioned between the tip part 17 and the base end part 13 is formed in a cylindrical shape so that the flexible wire 18 is inserted through the center. The intermediate part 19 is formed so that when the mandrel 6 is pulled out from the bent tube material 2, the intermediate part 19 is divided and pulled out one by one. Is done. The cord 20 may be anything that can withstand the heat during processing, and may be composed of, for example, a wire or a chain. The other end of the cable 20 may be provided with an identification unit (not shown) indicating the divided parts 16 to be connected. The identification unit may be a tag on which a number or the like is written, or may be formed by coloring the other end of the cable 20. In particular, the intermediate part 19 constituting the bent portion 15 is divided so that the angles θ between the divided surfaces 21 centering on the bent center O are equal.

図3、図4及び図5に示すように、それぞれの分割パーツ16には、隣接する分割パーツ16と係脱可能に嵌合すると共に隣接する分割パーツ16の捻れ方向の移動を規制する嵌合部22が形成されている。嵌合部22は、隣接する2つの分割パーツ16の一方に形成された雄嵌合部23と、他方の分割パーツ16に形成され雄嵌合部23と嵌合される雌嵌合部24とからなる。雄嵌合部23は、分割パーツ16の分割面21の中央に形成され軸方向に筒状に突出する芯部25と、芯部25の外周から径方向外方に延びて形成される羽根部26とからなる。羽根部26は、芯部25から直径方向に延出するように周方向に180度の間隔を隔てて2つ形成されている。また特に羽根部26は、マンドレル6の屈曲中心Oを中心とする径方向に沿って形成されており、嵌合部22の係脱が容易になされるようになっている。   As shown in FIGS. 3, 4, and 5, each divided part 16 is fitted to the adjacent divided part 16 so as to be detachable and to restrict the movement of the adjacent divided part 16 in the twisting direction. A portion 22 is formed. The fitting portion 22 includes a male fitting portion 23 formed on one of two adjacent divided parts 16 and a female fitting portion 24 formed on the other divided part 16 and fitted to the male fitting portion 23. Consists of. The male fitting portion 23 is formed at the center of the split surface 21 of the split part 16 and protrudes in a cylindrical shape in the axial direction, and a blade portion formed by extending radially outward from the outer periphery of the core portion 25. 26. Two blade portions 26 are formed at intervals of 180 degrees in the circumferential direction so as to extend from the core portion 25 in the diameter direction. In particular, the blade portion 26 is formed along a radial direction centering on the bending center O of the mandrel 6 so that the fitting portion 22 can be easily engaged and disengaged.

雌嵌合部24は、芯部25と羽根部26に対応する凹状に形成されており、雄嵌合部23を嵌入させるようになっている。   The female fitting portion 24 is formed in a concave shape corresponding to the core portion 25 and the blade portion 26, and the male fitting portion 23 is fitted therein.

また、基端部13には、フレキシブルワイヤ18を引っ張るための図示しない締付け装置が設けられている。   Further, the base end portion 13 is provided with a tightening device (not shown) for pulling the flexible wire 18.

次に本実施の形態の作用を述べる。   Next, the operation of this embodiment will be described.

図1に示すように、管材2を曲げ加工する場合、まず、分割パーツ16を連結して所定の形状のマンドレル6を形成し、次に、マンドレル6を外枠5の曲げ穴部4内に位置させると共にマンドレル6の先端を曲げ穴部4の所定位置に位置させ、外枠5とマンドレル6を所定の位置に設置して押出曲げ加工装置1を組み立てる。   As shown in FIG. 1, when bending the pipe material 2, first, the divided parts 16 are connected to form a mandrel 6 having a predetermined shape, and then the mandrel 6 is placed in the bending hole 4 of the outer frame 5. The extrusion bending apparatus 1 is assembled by positioning the tip of the mandrel 6 at a predetermined position of the bending hole 4 and installing the outer frame 5 and the mandrel 6 at the predetermined position.

図3及び図4に示すように、分割パーツ16を連結する場合、まず、先端パーツ17に連結されたフレキシブルワイヤ18を中間パーツ19に所定の順番で挿通すると共に、それぞれの中間パーツ19の索20を基端側の全ての中間パーツ19に挿通し、隣接する分割パーツ16の嵌合部22同士を嵌合させる。このとき、嵌合部22の芯部25は、隣接する分割パーツ16同士の中心を合わせ、羽根部26は、周方向の位置を合わせるため、分割パーツ16同士を連結したときの形状を容易かつ確実に所定の形状にできる。   As shown in FIGS. 3 and 4, when connecting the divided parts 16, first, the flexible wires 18 connected to the tip parts 17 are inserted into the intermediate parts 19 in a predetermined order, and the cables of the respective intermediate parts 19 are connected. 20 is inserted through all the intermediate parts 19 on the base end side, and the fitting parts 22 of the adjacent divided parts 16 are fitted together. At this time, the core portion 25 of the fitting portion 22 aligns the centers of the adjacent divided parts 16, and the blade portion 26 aligns the positions in the circumferential direction. It can be surely made into a predetermined shape.

この後、図5に示すように、フレキシブルワイヤ18を基端部13に挿通すると共に先端パーツ17を基端部13側に引き寄せるように締付け装置でフレキシブルワイヤ18を引っ張る。これにより、各分割パーツ16に圧縮力が作用し、各分割パーツ16が密に連結されて所定形状のマンドレル6が形成される。   Thereafter, as shown in FIG. 5, the flexible wire 18 is inserted into the proximal end portion 13 and the flexible wire 18 is pulled by a tightening device so that the distal end part 17 is pulled toward the proximal end portion 13 side. Thereby, a compressive force acts on each divided part 16, and each divided part 16 is closely connected to form a mandrel 6 having a predetermined shape.

図2に示すように、外枠5の曲げ穴部4内にマンドレル6を位置させる場合、外枠5を二つ割りに分割して曲げ穴部4を分割し、分割された曲げ穴部4内にマンドレル6を収容し、外枠5を組み立てる。   As shown in FIG. 2, when the mandrel 6 is positioned in the bending hole 4 of the outer frame 5, the outer frame 5 is divided into two parts to divide the bending hole part 4, and the divided bending hole part 4 is divided into the divided bending hole parts 4. The mandrel 6 is accommodated and the outer frame 5 is assembled.

このようにして、押出曲げ加工装置1が組み立てられたら、図1に示すように、外枠5の第1直穴部3内に予め加熱された管材2を収容し、押出装置7にて管材2を曲げ穴部4に押し出して曲げ加工する。管材2は、曲げ穴部4に沿って曲げられると共に、マンドレル6に嵌合され、潰れる等の曲げ穴部4に沿わない形状への変形を防止されつつ所定の形状に成型される。また、曲げ穴部4を通過して第2直穴部27内に至った管材2は、直線状に成型される。   When the extrusion bending apparatus 1 is assembled in this way, as shown in FIG. 1, the preheated tube material 2 is accommodated in the first straight hole portion 3 of the outer frame 5, and the extruding device 7 uses the tube material. 2 is extruded into the bending hole 4 and bent. The tube material 2 is bent along the bending hole portion 4 and fitted into the mandrel 6, and is molded into a predetermined shape while being prevented from being deformed into a shape that does not follow the bending hole portion 4, such as being crushed. In addition, the tube material 2 that has passed through the bent hole portion 4 and reached the second straight hole portion 27 is formed into a straight line.

この後、外枠5を分割して曲げ穴部4内から管材2を取り出し、管材2内からマンドレル6を取り出す。管材2内からマンドレル6を取り出す場合、まず、後端の分割パーツ16から基端部13を取り外すと共に、フレキシブルワイヤ18から締付け装置を取り外す。この後、図7に示すように、管材2内で最後端に位置する中間パーツ19の索20を引いて隣接する中間パーツ19から分離させると共に、管材2の外に引き出す。このとき、フレキシブルワイヤ18が中間パーツ19をガイドする軸として機能し、中間パーツ19が管材2内で回転等して引っ掛かるのを防ぐ。以降、同様の作業を順次繰り返して全ての中間パーツ19を管材2の外に引き出したのち、フレキシブルワイヤ18を引いて先端パーツ17を管材2の外側に引き出す。マンドレル6を順次分割して引き出すことができるため、管材2がJ字状以外の形状、例えばL字状に屈曲される場合であっても管材2内からマンドレル6を容易に取り出すことができ、管材2を複雑な形状に押出曲げ加工できる。   Thereafter, the outer frame 5 is divided, the tube material 2 is taken out from the bent hole portion 4, and the mandrel 6 is taken out from the tube material 2. When taking out the mandrel 6 from the inside of the tube material 2, first, the base end portion 13 is removed from the rear-part split part 16 and the fastening device is removed from the flexible wire 18. Thereafter, as shown in FIG. 7, the cord 20 of the intermediate part 19 located at the rearmost end in the pipe material 2 is pulled and separated from the adjacent intermediate part 19 and pulled out of the pipe material 2. At this time, the flexible wire 18 functions as a shaft that guides the intermediate part 19, and prevents the intermediate part 19 from being caught by being rotated in the pipe member 2. Thereafter, the same operation is sequentially repeated to draw all the intermediate parts 19 out of the pipe material 2, and then the flexible wire 18 is drawn to pull out the tip part 17 to the outside of the pipe material 2. Since the mandrel 6 can be sequentially divided and pulled out, the mandrel 6 can be easily taken out from the tube material 2 even when the tube material 2 is bent into a shape other than the J shape, for example, an L shape, The tube material 2 can be extruded and bent into a complicated shape.

このように、マンドレル6を、その先端から後端にかけて複数の分割パーツ16で形成し、その先端の分割パーツ16たる先端パーツ17にフレキシブルワイヤ18を連結すると共にそのフレキシブルワイヤ18を後方の分割パーツ16を挿通して最後端の分割パーツ16まで延出させ、これら分割パーツ16からなるマンドレル6を曲げ穴部4に位置させると共に、その先端を曲げ穴部4の所定位置に位置させ、かつ、フレキシブルワイヤ18にて各分割パーツ16に圧縮力を作用させて各分割パーツ16を密に連結してマンドレル6としたため、フレキシブルワイヤ18による圧縮力をなくすことで容易にマンドレル6を複数の分割パーツ16に分割でき、管材2をL字状等の複雑な形状に形成しても管材2内からマンドレル6を容易に引き抜くことができ、管材2を複雑な形状に押出曲げ加工することができる。このため、管材2の曲げ加工部分の一端に必要であった溶接構造を削減することができ、溶接構造を削減した一体型の配管形状が製作可能となる。   In this way, the mandrel 6 is formed by a plurality of divided parts 16 from the front end to the rear end, and the flexible wire 18 is connected to the front end part 17 which is the front divided part 16 and the flexible wire 18 is connected to the rear divided part. 16 is extended to the split part 16 at the end, and the mandrel 6 composed of these split parts 16 is positioned in the bending hole 4, and the tip thereof is positioned at a predetermined position of the bending hole 4, and Since the compression force is applied to each divided part 16 by the flexible wire 18 and the divided parts 16 are closely connected to form the mandrel 6, the mandrel 6 can be easily divided into a plurality of divided parts by eliminating the compression force by the flexible wire 18. The mandrel 6 can be easily divided from the inside of the tube material 2 even if the tube material 2 is formed into a complicated shape such as an L shape. Can Nuku come, can be extruded bent tubing 2 into complex shapes. For this reason, it is possible to reduce the welded structure required at one end of the bent portion of the pipe material 2, and it is possible to manufacture an integrated pipe shape with a reduced welded structure.

また、分割パーツ16のそれぞれに索20を連結し、曲げ加工後の管材2内からマンドレル6を引き抜くとき、基端側の分割パーツ16から順に引くように索20を引いてマンドレル6を分解しながら引き抜くようにしたため、管材2内のマンドレル6を複数の分割パーツ16に容易に分割でき、容易に引き抜くことができる。   Further, when the cord 20 is connected to each of the divided parts 16 and the mandrel 6 is pulled out from the bent tube 2, the mandrel 6 is disassembled by pulling the cord 20 so as to be pulled in order from the divided part 16 on the proximal end side. Therefore, the mandrel 6 in the pipe 2 can be easily divided into a plurality of divided parts 16 and can be easily pulled out.

分割パーツ16には、隣接する分割パーツ16と係脱可能に嵌合すると共に隣接する分割パーツ16の捻れ方向の移動を規制する嵌合部22が形成されるものとしたため、分割パーツ16を連結してマンドレル6を形成するとき、確実かつ容易に所定の形状にできる。   The split part 16 is formed with a fitting portion 22 that detachably engages with the adjacent split part 16 and restricts movement of the adjacent split part 16 in the twisting direction. Thus, when the mandrel 6 is formed, it can be surely and easily formed into a predetermined shape.

嵌合部22は、隣接する2つの分割パーツ16の一方に形成された雄嵌合部23と、他方の分割パーツ16に形成され雄嵌合部23と嵌合される雌嵌合部24とを備え、雄嵌合部23には、径方向に延びる羽根部26が形成されるものとしたため、隣接する分割パーツ16の捻れ方向の移動を簡易な構造で容易に規制することができる。   The fitting portion 22 includes a male fitting portion 23 formed on one of two adjacent divided parts 16 and a female fitting portion 24 formed on the other divided part 16 and fitted to the male fitting portion 23. Since the blade portion 26 extending in the radial direction is formed in the male fitting portion 23, movement of the adjacent divided parts 16 in the twist direction can be easily restricted with a simple structure.

なお、嵌合部22は、隣接する2つの分割パーツ16の一方に形成された雄嵌合部23と、他方の分割パーツ16に形成された雌嵌合部24とからなるものとしたが、これに限るものではない、対向する分割面21に雄嵌合部23と雌嵌合部24の双方が互いに噛み合うように形成されるようにしてもよい。   In addition, although the fitting part 22 shall consist of the male fitting part 23 formed in one of the two adjacent divided parts 16, and the female fitting part 24 formed in the other divided part 16, However, the present invention is not limited to this, and both the male fitting portion 23 and the female fitting portion 24 may be formed so as to mesh with each other on the facing divided surface 21.

また、屈曲部15を構成する中間パーツ19は、その屈曲中心Oを中心とする分割面21間の角度θが均等となるように分割されるものとしたが、管材2から中間パーツ19を容易に引き抜ける場合、分割面21間の角度θは均等でなくともよい。   Moreover, although the intermediate part 19 which comprises the bending part 15 shall be divided | segmented so that the angle (theta) between the division surfaces 21 centering on the bending center O may become equal, the intermediate part 19 is easily made from the pipe material 2. When pulling out, the angle θ between the divided surfaces 21 may not be equal.

またさらに、L字状の配管を製造する押出曲げ加工装置1について述べたが、本願発明はこれに限るものではない。曲げ半径や曲げ方向が異なる複数の曲げ部を有する配管を製造するものであってもよい。例えば図8に示すように、三次元的に屈曲される曲げ管部40を有する配管41、具体的には、水平軸を中心として屈曲する第1曲げ部42と鉛直軸を中心として屈曲する第2曲げ部43とを有する曲げ管部40を備えた配管41を製造するものであってもよい。この場合、図9(a)、(b)に示すように、押出曲げ加工装置44の曲げ穴部45は、図8に示す第1曲げ部42と第2曲げ部43の形状に沿って形成されるとよく、マンドレル46の屈曲部47は、曲げ穴部45に沿うように曲げられるとよい。   Furthermore, although the extrusion bending apparatus 1 which manufactures L-shaped piping was described, this invention is not limited to this. You may manufacture piping which has a some bending part from which a bending radius and a bending direction differ. For example, as shown in FIG. 8, a pipe 41 having a bending pipe portion 40 bent three-dimensionally, specifically, a first bending portion 42 bent around a horizontal axis and a first bending portion bent around a vertical axis. The piping 41 provided with the bending pipe part 40 which has the 2 bending part 43 may be manufactured. In this case, as shown in FIGS. 9A and 9B, the bending hole portion 45 of the extrusion bending apparatus 44 is formed along the shapes of the first bending portion 42 and the second bending portion 43 shown in FIG. The bent portion 47 of the mandrel 46 is preferably bent along the bent hole portion 45.

本発明の好適実施の形態を示す押出曲げ加工装置の側断面図である。It is a sectional side view of the extrusion bending apparatus which shows suitable embodiment of this invention. 図1の平面図である。It is a top view of FIG. 分割パーツを連結してマンドレルを組み立てている状態の斜視図である。It is a perspective view in the state where a split part is connected and a mandrel is assembled. 分割パーツを連結してマンドレルを組み立てている状態の斜視図である。It is a perspective view in the state where a split part is connected and a mandrel is assembled. フレキシブルワイヤを引いて分割パーツを密に連結している状態の側面図である。It is a side view of the state which pulled the flexible wire and has connected the divided parts closely. マンドレルの要部斜視図である。It is a principal part perspective view of a mandrel. マンドレルから分割パーツを分割している状態の斜視図である。It is a perspective view in the state where the divided parts are divided from the mandrel. 本発明に係る押出曲げ加工装置で製造できる配管の他の例の斜視図である。It is a perspective view of the other example of piping which can be manufactured with the extrusion bending apparatus which concerns on this invention. (a)は図8の配管を製造する曲げ加工装置の側面図であり、(b)は(a)の平面図である。(A) is a side view of the bending apparatus which manufactures piping of FIG. 8, (b) is a top view of (a). 従来の押出曲げ加工装置の側断面図である。It is a sectional side view of the conventional extrusion bending apparatus. 図10の平面図である。It is a top view of FIG. 押出曲げ加工装置で製造される配管の側面図であり、(a)は従来の押出曲げ加工装置で製造できるものを示し、(b)は本発明に係る押出曲げ加工装置で製造できるものを示す。It is a side view of piping manufactured with an extrusion bending apparatus, (a) shows what can be manufactured with the conventional extrusion bending apparatus, (b) shows what can be manufactured with the extrusion bending apparatus which concerns on this invention. .

符号の説明Explanation of symbols

1 押出曲げ加工装置
2 管材
3 第1直穴部(直穴部)
4 曲げ穴部
5 外枠
6 マンドレル
7 押出装置
16 分割パーツ
17 先端パーツ(分割パーツ)
18 フレキシブルワイヤ
20 索
22 嵌合部
23 雄嵌合部
24 雌嵌合部
26 羽根部
DESCRIPTION OF SYMBOLS 1 Extrusion bending apparatus 2 Tubing material 3 1st straight hole part (straight hole part)
4 Bending hole 5 Outer frame 6 Mandrel 7 Extruder 16 Split part 17 Tip part (Split part)
18 flexible wire 20 rope 22 fitting part 23 male fitting part 24 female fitting part 26 blade part

Claims (4)

外枠に、曲げ加工する管材を収容する直穴部と、その直穴部に連結して管材を曲げ加工する曲げ穴部とを形成し、その曲げ穴部に曲げ加工する管材の変形を防止すべく管材内に嵌合すると共に曲げ穴部に沿って曲げられたマンドレルを設け、上記外枠の直穴部に管材を挿入し、この管材を押出装置にて曲げ穴部に押し出して曲げ加工する押出曲げ加工装置において、上記マンドレルを、その先端から後端にかけて複数の分割パーツで形成し、その先端の分割パーツにフレキシブルワイヤを連結すると共にそのフレキシブルワイヤを後方の分割パーツを挿通して最後端の分割パーツまで延出させ、これら分割パーツからなるマンドレルを上記曲げ穴部に位置させると共に、その先端を曲げ穴部の所定位置に位置させ、かつ、上記フレキシブルワイヤにて各分割パーツに圧縮力を作用させて各分割パーツを密に連結してマンドレルとしたことを特徴とする押出曲げ加工装置。   The outer frame is formed with a straight hole part that accommodates the pipe material to be bent and a bent hole part that is connected to the straight hole part to bend the pipe material and prevents deformation of the pipe material that is bent into the bent hole part. A mandrel that fits into the pipe material and bends along the bending hole is provided, the pipe is inserted into the straight hole of the outer frame, and the pipe is extruded into the bending hole by an extrusion device. In the extrusion bending apparatus, the mandrel is formed of a plurality of divided parts from the front end to the rear end, a flexible wire is connected to the front divided part, and the flexible wire is inserted through the rear divided part to be the last The mandrel made of these divided parts is positioned in the bending hole, the tip thereof is positioned at a predetermined position of the bending hole, and the flexible wall is extended. Extrusion bending device, characterized in that the mandrel in close connecting each divided part by applying a compressive force to the divided parts at ya. 上記分割パーツのそれぞれに索を連結し、曲げ加工後の管材内から上記マンドレルを引き抜くとき、基端側の分割パーツから順に引くように上記索を引いてマンドレルを分解しながら引き抜くようにした請求項1記載の押出曲げ加工装置。   When connecting a cord to each of the divided parts and pulling out the mandrel from the bent pipe, the cord is pulled out in order from the divided part on the base end side, and the mandrel is pulled out while disassembling. Item 2. An extrusion bending apparatus according to Item 1. 上記分割パーツには、隣接する分割パーツと係脱可能に嵌合すると共に隣接するパーツの捻れ方向の移動を規制する嵌合部が形成された請求項1又は2記載の押出曲げ加工装置。   The extrusion bending apparatus according to claim 1 or 2, wherein the divided part is formed with a fitting part that is detachably fitted to an adjacent divided part and restricts movement of the adjacent part in a twisting direction. 上記嵌合部は、隣接する2つの分割パーツの一方に形成された雄嵌合部と、他方の分割パーツに形成され上記雄嵌合部と嵌合される雌嵌合部とを備え、上記雄嵌合部には、径方向に延びる羽根部が形成された請求項3記載の押出曲げ加工装置。   The fitting portion includes a male fitting portion formed on one of two adjacent divided parts, and a female fitting portion formed on the other divided part and fitted to the male fitting portion, The extrusion bending apparatus according to claim 3, wherein the male fitting portion is formed with a blade portion extending in a radial direction.
JP2008083547A 2008-03-27 2008-03-27 Extrusion bending apparatus Pending JP2009233709A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954389A (en) * 2010-09-16 2011-01-26 浙江天兴管业有限公司 Metal elbow cold extrusion molding device
CN104043734A (en) * 2014-06-11 2014-09-17 沈阳飞机工业(集团)有限公司 Small-bending-radius aviation conduit bend forming die and forming method thereof
CN104259275A (en) * 2014-10-13 2015-01-07 马钢(集团)控股有限公司 Electric-arc furnace cooling water pipe elbow production device
CN106734438A (en) * 2017-01-13 2017-05-31 南昌航空大学 One kind pushes away o ing method with small curvature bending radius L type thin-wall aluminum alloy bend pipe
CN109821945A (en) * 2019-03-18 2019-05-31 燕山大学 A kind of metal pipe material bending apparatus

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Publication number Priority date Publication date Assignee Title
JPS58151922A (en) * 1982-03-05 1983-09-09 Hitachi Ltd Bending method of pipe
JPS60102230A (en) * 1983-11-09 1985-06-06 Takayasu Kogyo Kk Manufacture of elbow
JPS61245944A (en) * 1985-04-24 1986-11-01 Japan Steel Works Ltd:The Core for forming elbow
JPH06182748A (en) * 1991-10-08 1994-07-05 Minnesota Mining & Mfg Co <3M> Hard tubular member, its production, and mandrel used for producing hard tubular member

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151922A (en) * 1982-03-05 1983-09-09 Hitachi Ltd Bending method of pipe
JPS60102230A (en) * 1983-11-09 1985-06-06 Takayasu Kogyo Kk Manufacture of elbow
JPS61245944A (en) * 1985-04-24 1986-11-01 Japan Steel Works Ltd:The Core for forming elbow
JPH06182748A (en) * 1991-10-08 1994-07-05 Minnesota Mining & Mfg Co <3M> Hard tubular member, its production, and mandrel used for producing hard tubular member

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954389A (en) * 2010-09-16 2011-01-26 浙江天兴管业有限公司 Metal elbow cold extrusion molding device
CN101954389B (en) * 2010-09-16 2012-08-29 浙江天兴管业有限公司 Metal elbow cold extrusion molding device
CN104043734A (en) * 2014-06-11 2014-09-17 沈阳飞机工业(集团)有限公司 Small-bending-radius aviation conduit bend forming die and forming method thereof
CN104259275A (en) * 2014-10-13 2015-01-07 马钢(集团)控股有限公司 Electric-arc furnace cooling water pipe elbow production device
CN106734438A (en) * 2017-01-13 2017-05-31 南昌航空大学 One kind pushes away o ing method with small curvature bending radius L type thin-wall aluminum alloy bend pipe
CN109821945A (en) * 2019-03-18 2019-05-31 燕山大学 A kind of metal pipe material bending apparatus

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