JPH07328726A - Method for bending pipe and device therefor - Google Patents
Method for bending pipe and device thereforInfo
- Publication number
- JPH07328726A JPH07328726A JP14717094A JP14717094A JPH07328726A JP H07328726 A JPH07328726 A JP H07328726A JP 14717094 A JP14717094 A JP 14717094A JP 14717094 A JP14717094 A JP 14717094A JP H07328726 A JPH07328726 A JP H07328726A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- mandrel
- bending
- rod
- shaped
- 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】この発明はパイプ曲げ加工方法及
びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe bending method and apparatus.
【０００２】[0002]
【従来の技術】従来、この種のパイプ曲げ加工方法とし
て、図６に示すパイプ曲げ加工装置を使用したものが知
られている。2. Description of the Related Art Heretofore, as a pipe bending method of this kind, a method using a pipe bending apparatus shown in FIG. 6 has been known.
【０００３】前記パイプ曲げ加工装置は、一対の支持軸
３０を備えた支持治具３１と、両支持軸３０に各々回動
自在に枢支されると共に、パイプＭが挿入されるパイプ
挿入溝３２を備え、各パイプ挿入溝３２が長手方向に連
なるように互いの先端部が突き合わされてセットされた
一対の揺動ダイス３３（受け部材）と、支持治具３１に
対して相対的に接離するように設けられ、先端には略パ
イプＭの直径を有する円弧状の成形溝３４が形成された
押圧部３５を備え、該押圧部３５によってパイプＭを押
圧するラム３６（成形型）と、揺動ダイス３２の突合わ
せ端部をラム３６の反対側から支持するクッション部材
３７とを有している。The pipe bending apparatus includes a support jig 31 having a pair of support shafts 30, and a pipe insertion groove 32 into which the pipe M is inserted while being pivotally supported by both support shafts 30. And a pair of oscillating dies 33 (receiving members), which are set with their tips abutting each other so that the pipe insertion grooves 32 are continuous in the longitudinal direction, and are relatively contacted and separated from the support jig 31. And a ram 36 (molding die) for pressing the pipe M by the pressing portion 35, the pressing portion 35 having an arc-shaped forming groove 34 having a diameter of the pipe M is formed at the tip. It has a cushion member 37 that supports the abutting end of the swing die 32 from the opposite side of the ram 36.
【０００４】このようなパイプ曲げ加工装置を使用して
パイプ曲げ加工を行う場合には、揺動ダイス３３をパイ
プ挿入溝３２が長手方向に連なるように突き合わせた状
態でパイプＭをパイプ挿入溝３２に挿入した後、両揺動
ダイス３３の突合わせ端部をクッション部材３７により
支持しながら、揺動ダイス３３の反対側からパイプＭを
ラム３６で押圧して行う。このとき、ラム３６の押圧で
パイプＭが両揺動ダイス３２の突合わせ端部間に向かっ
て押し込まれ、パイプＭと揺動ダイス３３との間に生じ
る摩擦力によりパイプＭのクッション部材３７側部位に
伸びが発生することとなり、この結果、パイプＭは押圧
部３５に見合った曲げ半径に曲げられる。When pipe bending is performed using such a pipe bending apparatus, the pipe M is inserted into the pipe insertion groove 32 with the oscillating dies 33 butted so that the pipe insertion grooves 32 are continuous in the longitudinal direction. Then, the pipe M is pressed by the ram 36 from the opposite side of the swing dies 33 while supporting the abutting ends of the swing dies 33 by the cushion member 37. At this time, the pipe M is pushed toward the space between the abutting ends of the swing dies 32 by the ram 36, and the cushion member 37 side of the pipe M is generated by the frictional force generated between the pipe M and the swing dies 33. As a result, elongation occurs at the portion, and as a result, the pipe M is bent to a bending radius suitable for the pressing portion 35.
【０００５】しかしながら、上記従来のパイプ曲げ加工
方法では、パイプＭのクッション部材３７側部位をパイ
プＭの内側から支持していないことから、パイプＭのク
ッション部材３７側部位に伸びが生じるが、その伸びは
小さくて曲げ変形に追い付かないこととなる。この結
果、パイプＭのクッション部材３７側部位は伸びると共
にラム３６側に偏位することとなる。このため、曲げ半
径が大きい場合は良いが、小さくなると、パイプＭが偏
平になるおそれがある。この点から、曲げ半径を余り小
さくできない。However, in the above conventional pipe bending method, since the portion of the pipe M on the cushion member 37 side is not supported from the inside of the pipe M, the portion of the pipe M on the cushion member 37 side is stretched. The elongation is too small to keep up with the bending deformation. As a result, the portion of the pipe M on the cushion member 37 side extends and is displaced toward the ram 36 side. Therefore, it is preferable that the bending radius is large, but if the bending radius is small, the pipe M may become flat. From this point, the bending radius cannot be made too small.
【０００６】そこで、図７に示すパイプ曲げ加工装置を
使用したパイプ曲げ加工方法が考えられている。Therefore, a pipe bending method using the pipe bending apparatus shown in FIG. 7 has been considered.
【０００７】このパイプ曲げ加工装置が前記パイプ曲げ
加工装置と異なる点は、パイプＭ内に両側から挿入され
る一対の棒状心金３８を設けて、クッション部材をなく
したことである。尚、同一部品には同一符号を付した。The pipe bending apparatus differs from the pipe bending apparatus described above in that a pair of rod-shaped mandrel 38 which are inserted into the pipe M from both sides are provided to eliminate the cushion member. The same parts are designated by the same reference numerals.
【０００８】このようなパイプ曲げ加工装置を使用して
パイプ曲げ加工を行う場合には、パイプＭ内に両側から
各々棒状心金３８を挿入しておき、支持治具の支持軸３
０に回動可能に設けられた一対の受け部材３３を各々の
パイプ挿入溝が長手方向に連なるように突き合わせた状
態でパイプＭを前記パイプ挿入溝に挿入した後、両受け
部材３３の反対側からパイプＭを成形型３６で押圧して
曲げ加工を行う。このとき、棒状心金３８の先端部はパ
イプＭの成形型３６側の反対側部位に押し付けられて、
棒状心金３８とパイプＭとの間に摩擦力が生じ、この摩
擦力で棒状心金３８は後退し難くなる。最小曲げ半径Ｒ
＝３Ｄ（Ｄ：パイプ外径）ぐらいまでは、棒状心金３８
によりパイプＭの成形型３６側の反対側部位は伸ばされ
ると共に成形型３６側に偏位することが抑えられ、この
結果、パイプＭは偏平になることなく曲げられると共
に、このパイプＭの曲り部位から棒状心金３８が漸次後
退して行く。When performing pipe bending using such a pipe bending apparatus, the rod-shaped mandrel 38 is inserted into the pipe M from both sides, and the support shaft 3 of the support jig is inserted.
After inserting the pipe M into the pipe insertion groove in a state where a pair of receiving members 33 rotatably provided at 0 are butted so that the pipe insertion grooves are continuous in the longitudinal direction, the opposite sides of both receiving members 33 Then, the pipe M is pressed by the molding die 36 to be bent. At this time, the tip portion of the rod-shaped mandrel 38 is pressed against the portion of the pipe M opposite to the molding die 36 side,
A frictional force is generated between the rod-shaped mandrel 38 and the pipe M, and this frictional force makes it difficult for the rod-shaped mandrel 38 to retract. Minimum bending radius R
= Up to 3D (D: pipe outer diameter) up to 38 bar mandrel
As a result, the portion of the pipe M on the side opposite to the forming die 36 is stretched and prevented from being displaced to the forming die 36 side. As a result, the pipe M is bent without being flat and the bent portion of the pipe M is The rod-shaped mandrel 38 gradually recedes from there.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、棒状心
金３８を使用する上記従来のパイプ曲げ加工方法では、
最小曲げ半径Ｒを３Ｄより小さく、例えばパイプ外径以
下にする場合には、パイプＭの成形型３６側の反対側部
位に生じる伸びが曲げ変形に追い付かず、このため成形
型３６側に偏位することとなり、この結果、パイプＭが
偏平になったり破壊する。たとえパイプＭに焼鈍や表面
処理を行ってパイプＭの変形能を大きくしても、曲げ半
径Ｒはパイプ外径までであり、それより小さくすると、
やはりパイプＭが偏平になったり破壊する。However, in the above conventional pipe bending method using the rod-shaped mandrel 38,
When the minimum bending radius R is smaller than 3D and is, for example, equal to or smaller than the pipe outer diameter, the elongation generated at the portion of the pipe M on the opposite side of the forming die 36 side cannot catch up with the bending deformation, and therefore is displaced to the forming die 36 side. As a result, the pipe M becomes flat or broken. Even if the pipe M is annealed or surface-treated to increase the deformability of the pipe M, the bending radius R is up to the pipe outer diameter.
After all, the pipe M becomes flat and breaks.
【００１０】そこで、従来、極小曲げを行う場合には、
伸びのあるパイプ材料を使用し、その曲げ部位に熱を加
えて曲げ加工を行い、これにより生じる座屈，偏平や破
壊に対する対策として液圧，ボール通し，砂圧等の二次
工程を行うことが考えられている。Therefore, conventionally, in the case of performing a minimum bending,
Use a stretchable pipe material and apply heat to the bending part to bend it, and perform secondary processes such as hydraulic pressure, ball passing, sand pressure etc. as a countermeasure against buckling, flattening and destruction caused by it. Is being considered.
【００１１】しかし、このパイプ曲げ加工方法では、パ
イプの極小曲げは行えるが、伸びのあるパイプ材料を使
用した上で尚かつ局部加熱や二次工程をしなければなら
ず、加工コストの上昇を招くと共に、最適形状を保つこ
とが難しいという問題が生じる。In this pipe bending method, however, the pipe can be bent in a very small amount, but it is necessary to use a stretchable pipe material and still carry out local heating and a secondary process, resulting in an increase in processing cost. At the same time, it causes a problem that it is difficult to maintain the optimum shape.
【００１２】この発明は上記課題を解決するためになし
たもので、その第１の目的は、極小曲げを無理なく行え
るパイプ曲げ加工方法を提供することにある。The present invention has been made to solve the above problems, and a first object of the present invention is to provide a pipe bending method capable of performing extremely small bending without difficulty.
【００１３】また、この発明の第２の目的は、既存のパ
イプ曲げ加工装置の簡単な改造等により簡単に製作でき
ると共に、上記パイプ曲げ加工方法を確実に実施できる
パイプ曲げ加工装置を提供することにある。A second object of the present invention is to provide a pipe bending apparatus which can be easily manufactured by a simple modification of an existing pipe bending apparatus and which can surely carry out the above pipe bending method. It is in.
【００１４】[0014]
【課題を解決するための手段】上記第１の目的を達成す
るために、この発明は、請求項１に記載した通り、パイ
プの内部に、中央に球体状心金を位置させ、両側に各々
棒状心金を挿入しておき、支持治具に回動可能に設けら
れたパイプ挿入溝を有する一対の受け部材を前記パイプ
挿入溝が長手方向に連なるように突き合わせた状態で前
記パイプを前記パイプ挿入溝に挿入し、前記パイプの前
記球体状心金の挿入部位を前記両受け部材の突合わせ端
部間に対応させた後、該両受け部材の突合わせ端部をク
ッション部材により支持しながら、前記両受け部材の反
対側から前記パイプの球体状心金の挿入部位を成形型で
押圧して曲げ加工を行うものである。In order to achieve the first object, according to the present invention, as described in claim 1, a spherical mandrel is positioned in the center of the pipe, and the mandrel is provided on each side of the pipe. With the rod-shaped mandrel inserted, a pair of receiving members having a pipe insertion groove rotatably provided on the support jig are butted against each other so that the pipe insertion groove is continuous in the longitudinal direction. After inserting into the insertion groove and making the insertion part of the spherical mandrel of the pipe correspond between the abutting end portions of the both receiving members, while supporting the abutting end portions of the both receiving members by the cushion member. The bending portion is performed by pressing the insertion portion of the spherical cored bar of the pipe from the opposite side of the both receiving members with a molding die.
【００１５】また、上記第２の目的を達成するために、
この発明は、請求項２に記載した通り、一対の支持軸を
備えた支持治具と、前記両支持軸に各々回動自在に枢支
されると共に、パイプが挿入されるパイプ挿入溝を備
え、各パイプ挿入溝が長手方向に連なるように互いの先
端部が突き合わされてセットされた一対の受け部材と、
前記パイプ内に両側から挿入される一対の棒状心金と、
前記支持治具に対して相対的に接離するように設けら
れ、先端には略前記パイプの直径を有する円弧状の成形
溝が形成された押圧部を備え、該押圧部によって前記パ
イプを押圧する成形型とを有するパイプ曲げ加工装置に
おいて、前記各受け部材を、前記支持軸に回動自在に枢
支された溝部を有する外側部材と前記パイプ挿入溝を有
し前記外側部材の溝部に摺動自在に収容された内側部材
とで構成すると共に、前記両棒状心金間の前記パイプ内
には球体状心金を配設し、前記各外側部材の突合わせ端
部を前記成形型の反対側からクッション部材によって支
持し、前記パイプを前記球体状心金の位置にて前記押圧
部により押圧して曲げ加工を行うものである。In order to achieve the second object,
As described in claim 2, the present invention comprises a support jig having a pair of support shafts, a pipe insertion groove into which a pipe is inserted, while being pivotally supported by the support shafts. , A pair of receiving members that are set by abutting each other so that the pipe insertion grooves are continuous in the longitudinal direction,
A pair of bar-shaped cores inserted from both sides into the pipe,
A pressing portion is provided so as to be relatively close to and away from the supporting jig, and a tip is provided with an arc-shaped forming groove having a diameter of the pipe, and the pipe is pressed by the pressing portion. In the pipe bending apparatus having a molding die for forming the receiving member, the respective receiving members are slid on the groove portions of the outer member having the groove portion pivotally supported by the support shaft and the pipe insertion groove. And a spherical cored bar disposed in the pipe between the rod-shaped cores, and the abutting end of each outer member is opposite to the molding die. The pipe is supported by a cushion member from the side, and the pipe is bent by pressing the pipe at the position of the spherical mandrel by the pressing portion.
【００１６】[0016]
【作用】上記請求項１記載の構成によれば、両受け部材
の突合わせ端部を成形型の反対側からクッション部材に
より支持しながらパイプの球体状心金の挿入部位を成形
型の押圧部により押圧して、パイプを曲げ変形させ、こ
れによってパイプと該パイプ内に両側から挿入された棒
状心金との間に摩擦力を発生させ、この摩擦力で前記棒
状心金を後退し難くし、これら棒状心金によりパイプの
球体状心金の挿入部位のクッション部材側を伸ばす。こ
の伸びに伴いパイプを両受け部材のパイプ挿入溝内で摺
動させて、該受け部材で抑えずに前記伸びを自由にす
る。また、前記パイプに挿入した球体状心金によりその
挿入部位を曲げる前から曲げ完了までパイプが偏平しな
いように拘束する。この結果、曲げ半径がパイプ外径よ
り小さい曲げができることとなり、極小曲げが可能とな
る。According to the structure described in claim 1, while the butt ends of both receiving members are supported by the cushion member from the opposite side of the forming die, the insertion portion of the spherical mandrel of the pipe is pressed by the forming die. To bend and deform the pipe, thereby generating a frictional force between the pipe and the rod-shaped mandrel inserted into the pipe from both sides, and this frictional force makes it difficult to retract the rod-shaped mandrel. The rod-shaped mandrel extends the cushion member side of the insertion part of the spherical mandrel of the pipe. Along with this extension, the pipe is slid in the pipe insertion grooves of both receiving members, so that the extension is free without being restrained by the receiving members. Further, the spherical mandrel inserted into the pipe restrains the insertion part from being bent before the bending is completed until the bending is completed. As a result, it is possible to bend the bending radius smaller than the pipe outer diameter, and it is possible to make a very small bend.
【００１７】また、上記請求項２記載の構成によれば、
パイプ内に両側から棒状心金を挿入するタイプのパイプ
曲げ加工装置に、各受け部材の突合わせ端部を成形型の
反対側から支持するクッション部材を付設し、かつ前記
両棒状心金間の前記パイプ内に挿入される球体状心金を
使用すると共に、前記各受け部材を外側部材と内側部材
とで構成することで、パイプ曲げ加工装置を簡単に製作
可能となる。According to the above-mentioned structure of claim 2,
A pipe bending device of a type in which rod-shaped mandrel is inserted into the pipe from both sides is provided with a cushion member for supporting the abutting end of each receiving member from the opposite side of the forming die, and between the both rod-shaped mandrel. A pipe bending apparatus can be easily manufactured by using a spherical mandrel to be inserted into the pipe and configuring each of the receiving members with an outer member and an inner member.
【００１８】また、パイプ曲げ加工は次のように行う。
つまり、突き合わせた一対の内側部材のパイプ挿入溝に
パイプを挿入する。このパイプ内には、中央に球体状心
金を位置させ、両側に各々棒状心金を挿入して、これら
の棒状心金により前記球体状心金を前記両内側部材の突
合わせ端部間に対応させて配置しておく。上記パイプの
挿入後、該パイプの前記球体状心金の挿入部位に成形型
を接近移動させて、押圧部の成形溝を係合させ、該押圧
部で前記パイプの球体状心金の挿入部位を押圧する。こ
のとき、前記成形型による押圧でパイプが曲げ変形する
と共に、これに伴って前記両内側部材を各々収容した外
側部材の突合わせ端部がクッション部材により支持され
ながら外側部材の支持軸を中心として回動する。The pipe bending process is performed as follows.
That is, the pipe is inserted into the pipe insertion groove of the paired inner members. In this pipe, a spherical mandrel is located in the center, rod-shaped mandrels are inserted on both sides, and the spherical mandrel is inserted between the abutting ends of the inner members by these rod-shaped mandrels. Place them correspondingly. After inserting the pipe, the molding die is moved closer to the insertion part of the spherical mandrel of the pipe to engage the forming groove of the pressing portion, and the pressing part inserts the spherical mandrel of the pipe. Press. At this time, the pipe is bent and deformed by the pressing by the molding die, and the butt ends of the outer members respectively accommodating the both inner members are supported by the cushion member while the pipe is centered on the support shaft of the outer member. Rotate.
【００１９】そして、上記成形型による押圧時、両外側
部材の突合わせ端部をクッション部材により支持して、
パイプと該パイプ内に両側から各々挿入された棒状心金
との間に摩擦力を発生させ、この摩擦力で前記両棒状心
金を後退し難くし、これら棒状心金によりパイプの曲げ
部位のクッション部材側を伸ばす。また、前記内側部材
を前記外側部材の溝部に摺動自在に収容して、上記パイ
プの伸長時、該パイプを両棒状心金の挿入状態のままで
両外側部材の溝部内で摺動させ、パイプを自由に伸長さ
せる。更に、前記パイプの曲げ部位に挿入した球体状心
金によりパイプが偏平しないように拘束する。このた
め、上記パイプ曲げ加工方法を実施することが可能とな
る。During pressing by the molding die, the abutting ends of both outer members are supported by a cushion member,
A frictional force is generated between the pipe and the rod-shaped mandrel inserted into the pipe from both sides, and the frictional force makes it difficult for the rod-shaped mandrel to retreat. Extend the cushion member side. Further, the inner member is slidably accommodated in the groove portion of the outer member, and when the pipe is extended, the pipe is slid in the groove portions of the both outer members while the rod-shaped cores are inserted. Freely stretch the pipe. Further, the spherical mandrel inserted in the bent portion of the pipe restrains the pipe from flattening. Therefore, it becomes possible to carry out the pipe bending method.
【００２０】[0020]
【実施例】まず、この発明のパイプ曲げ加工方法を実施
するパイプ曲げ加工装置の実施例を説明する。First, an embodiment of a pipe bending apparatus for carrying out the pipe bending method of the present invention will be described.
【００２１】図１（１）はこの発明の一実施例になるパ
イプ曲げ加工装置の要部を示す（２）のＡ−Ａ線に沿う
正断面図、（２）は同要部を示す（１）のＢ−Ｂ線に沿
う側断面図、図２は図１（２）の側面図、図３は図１に
示すパイプ曲げ加工装置の要部の作用説明図、図４は同
パイプ曲げ加工装置の作動前の状態を示す正面図、図５
は同パイプ曲げ加工装置の作動後の状態を示す正面図で
ある。FIG. 1 (1) is a sectional view taken along the line AA of (2) showing a main part of a pipe bending apparatus according to an embodiment of the present invention, and (2) shows the same main part ( 1) is a side sectional view taken along the line BB, FIG. 2 is a side view of FIG. 1 (2), FIG. 3 is an explanatory view of the action of the main part of the pipe bending apparatus shown in FIG. 1, and FIG. FIG. 5 is a front view showing a state before the operation of the processing apparatus.
FIG. 4 is a front view showing a state after the operation of the pipe bending apparatus.
【００２２】パイプ曲げ加工装置は、図４及び図５に示
すように支持治具１と成形型２を備えている。支持治具
１は下部取付フレーム３上に設置され、成形型２は上部
取付フレーム４にガイド５を介して上下動自在に取り付
けられて前記上部取付フレーム４に設けたシリンダ６に
支持されている。そして、この成形型２は前記ガイド５
に案内されて前記シリンダ６により前記支持治具１に対
して図示所定のラインＬ上を相対的に接離するように設
けられている。The pipe bending apparatus is provided with a supporting jig 1 and a molding die 2 as shown in FIGS. The supporting jig 1 is installed on the lower mounting frame 3, and the molding die 2 is mounted on the upper mounting frame 4 via a guide 5 so as to be vertically movable, and is supported by a cylinder 6 provided on the upper mounting frame 4. . The molding die 2 has the guide 5
Is provided so as to be brought into contact with and separated from the support jig 1 on the predetermined line L in the figure by being guided by the cylinder 6.
【００２３】前記支持治具１は、下部取付フレーム３上
に互いに対向する一対の支持壁７を立設し、これら支持
壁７の一側間と他側間に各々支持軸１０を架設して構成
されている。８は前記支持壁７間に臨む前記下部取付フ
レーム３に形成された複数の貫通穴である。The supporting jig 1 has a pair of supporting walls 7 standing upright on the lower mounting frame 3 and a supporting shaft 10 installed between one side and the other side of the supporting walls 7. It is configured. Reference numeral 8 denotes a plurality of through holes formed in the lower mounting frame 3 facing the support walls 7.
【００２４】また、パイプ曲げ加工装置は、前記両支持
軸１０に各々回動自在に枢支される一対の受け部材９を
備えていて、これら受け部材９の回動中心（支持軸１
０）は各々前記所定のラインＬに対して対称に配置され
ている。Further, the pipe bending apparatus is provided with a pair of receiving members 9 rotatably supported by the support shafts 10 respectively, and the center of rotation of the receiving members 9 (the support shaft 1).
0) are arranged symmetrically with respect to the predetermined line L.
【００２５】前記両受け部材９は、パイプＭが挿入され
るパイプ挿入溝１３を備えていて、各パイプ挿入溝１３
が長手方向に連なるように図示しない停止機構により前
記回動中心を結ぶ線上で停止して互いの先端部が前記所
定のラインＬ上で突き合わされてセットされている。Each of the receiving members 9 has a pipe insertion groove 13 into which the pipe M is inserted.
Are stopped on a line connecting the centers of rotation by a stop mechanism (not shown) so that they are continuous in the longitudinal direction, and their front ends are abutted and set on the predetermined line L.
【００２６】各受け部材９は、図１に示すように、前記
支持軸１０に回動自在に枢支された溝部１１を有する外
側部材９Ａと、前記パイプ挿入溝１３を有し前記外側部
材９Ａの溝部１１に摺動自在に収容された内側部材９Ｂ
とで構成されている。前記支持軸１０は前記溝部１１を
形成する一対の側壁部１２に各々取り付けられている。
また、前記外側部材９Ａの後端部と前記内側部材９Ｂの
後端部との間には該内側部材９Ｂを前記所定のラインＬ
側に付勢するスプリング１４（弾性部材）が縮設されて
いる。更に、前記外側部材９Ｂの先端部には前記支持軸
１０を中心とした円弧面１５が底面から突合わせ部位に
渡って形成されていて、該円弧面１５により前記外側部
材９Ａが後述する押し板１７上で摺動回動できるように
なっている。As shown in FIG. 1, each receiving member 9 has an outer member 9A having a groove portion 11 pivotally supported by the support shaft 10 and an outer member 9A having the pipe insertion groove 13. Inner member 9B slidably accommodated in the groove portion 11 of
It consists of and. The support shaft 10 is attached to each of a pair of side wall portions 12 forming the groove portion 11.
The inner member 9B is provided between the rear end of the outer member 9A and the rear end of the inner member 9B by the predetermined line L.
The spring 14 (elastic member) that biases the side is contracted. Further, an arcuate surface 15 centered on the support shaft 10 is formed at the tip of the outer member 9B from the bottom surface to the abutting portion, and the arcuate surface 15 causes the outer member 9A to push the pressing plate described later. It can be slid and rotated on 17.
【００２７】更に、パイプ曲げ加工装置は、前記外側部
材９Ａの突合わせ端部を前記成形型２の反対側から支持
するクッション部材２１を備えている。つまり、前記下
部取付フレーム３に設けた前記各貫通穴８には、図５に
示すように、ロッド１６が上下動自在に挿通されてい
て、これらロッド１６の上端は押し板１７で結合され、
該ロッド１６の下端は受け板１８で結合されている。一
方、前記下部取付フレーム３には、前記受け板１８を移
動自在に挿通したボルト１９（取付部材）が垂設され、
該ボルト１９の挿通部にはナット２０（受け部）が設け
られている。このナット２０と前記受け板１８との間に
前記クッション部材２１が縮設されていて、該クッショ
ン部材２１の力により前記押し板１７が前記外側部材９
Ａの底面に当接している。前記クッション部材２１の力
は前記ナット２０の回転操作で調整される。Further, the pipe bending apparatus is provided with a cushion member 21 for supporting the abutting end portion of the outer member 9A from the opposite side of the molding die 2. That is, as shown in FIG. 5, rods 16 are vertically movably inserted into the through holes 8 provided in the lower mounting frame 3, and the upper ends of the rods 16 are joined by a push plate 17.
The lower end of the rod 16 is connected by a receiving plate 18. On the other hand, a bolt 19 (mounting member) that movably inserts the receiving plate 18 is vertically provided on the lower mounting frame 3.
A nut 20 (receiving portion) is provided in the insertion portion of the bolt 19. The cushion member 21 is contracted between the nut 20 and the receiving plate 18, and the force of the cushion member 21 causes the pushing plate 17 to move to the outer member 9.
It is in contact with the bottom surface of A. The force of the cushion member 21 is adjusted by rotating the nut 20.
【００２８】また、パイプ曲げ加工装置は、前記内側部
材９Ｂのパイプ挿入溝１３に挿入された前記パイプＭの
内部に両側から挿入される一対の棒状心金２３を備えて
いる。つまり、前記外側部材９Ａの後端部には各々前記
内側部材９Ｂの後端に臨む支持片２２が設けられ、該支
持片２２には貫通孔が形成されていて、該貫通孔に前記
棒状心金２３が摺動自在に挿通されている。これら棒状
心金２３の基端部には各々係合部２４が設けられてい
る。尚、前記上部取付フレーム４には前記所定のライン
Ｌに対して対称にＶ状に心金取出し用のシリンダ２５が
配設され、該シリンダ２５のロッド先端には逆Ｖ状の係
止具２６が装着されている。この係止具２６は、パイプ
Ｍが曲げ変形したときに該パイプＭ内に挿入してある前
記棒状心金２３の基端部に係合され、シリンダ２５のロ
ッド引込み作動時に前記棒状心金２３の基端部に設けた
前記係合部２４に係止可能となっている。Further, the pipe bending apparatus is provided with a pair of bar-shaped mandrel 23 which are inserted from both sides inside the pipe M inserted in the pipe insertion groove 13 of the inner member 9B. That is, the support member 22 facing the rear end of the inner member 9B is provided at the rear end portion of the outer member 9A, and a through hole is formed in the support member 22, and the rod-shaped core is provided in the through hole. Gold 23 is slidably inserted. Engaging portions 24 are provided at the base end portions of the rod-shaped mandrel 23, respectively. A cylinder 25 for taking out the mandrel is arranged in a V shape symmetrically with respect to the predetermined line L on the upper mounting frame 4, and an inverted V-shaped locking member 26 is provided at the rod tip of the cylinder 25. Is installed. The locking tool 26 is engaged with the base end portion of the rod-shaped mandrel 23 inserted into the pipe M when the pipe M is bent and deformed, and the rod-shaped mandrel 23 is engaged when the rod 25 of the cylinder 25 is retracted. It is possible to engage with the engaging portion 24 provided at the base end of the.
【００２９】前記成形型２は、先端には略前記パイプＭ
の直径を有する円弧状の成形溝２８が形成された略Ｖ形
状の押圧部２７を備えている。The molding die 2 has a pipe M at the tip thereof.
It has a substantially V-shaped pressing portion 27 in which an arc-shaped forming groove 28 having a diameter of is formed.
【００３０】更に、パイプ曲げ加工装置は、前記棒状心
金２３の他、前記棒状心金２３間の前記パイプＭ内に挿
入される球体状心金２９を備えている。Further, the pipe bending apparatus includes, in addition to the rod-shaped mandrel 23, a spherical mandrel 29 inserted into the pipe M between the rod-shaped mandrels 23.
【００３１】上記のように構成したパイプ曲げ加工装置
を使用してパイプ曲げ加工を行う場合には、パイプＭの
内部に、中央に球体状心金２９を位置させ、両側に各々
棒状心金２３を挿入しておく。そして、一対の内側部材
９Ｂを各々のパイプ挿入溝１３が長手方向に連なるよう
に突き合わせた状態で前記パイプＭを前記パイプ挿入溝
１３に挿入し、前記パイプＭの前記球体状心金２９の挿
入部位を前記両内側部材９Ｂの突合わせ端部間に対応さ
せる。When pipe bending is performed using the pipe bending apparatus configured as described above, a spherical mandrel 29 is located in the center of the pipe M, and rod-shaped mandrels 23 are arranged on both sides. Is inserted. Then, the pipe M is inserted into the pipe insertion groove 13 in a state where the pair of inner members 9B are abutted so that the pipe insertion grooves 13 are continuous in the longitudinal direction, and the spherical mandrel 29 of the pipe M is inserted. The part is made to correspond between the abutting ends of the both inner members 9B.
【００３２】しかる後、シリンダ６のロッド伸長作動に
よりガイド５で案内しながら成形型２の押圧部２７を前
記両内側部材９Ｂの反対側からパイプＭの球体状心金２
９の挿入部位に接近移動させ、該挿入部位に前記押圧部
２７の成形溝２８を係合させて、該押圧部２７で前記パ
イプＭの球体状心金２９の挿入部位を押圧する。Thereafter, the pressing portion 27 of the molding die 2 is guided from the opposite side of the inner members 9B to the spherical mandrel 2 of the pipe M while guiding the guide 5 by the rod extension operation of the cylinder 6.
9, the molding groove 28 of the pressing portion 27 is engaged with the insertion portion, and the pressing portion 27 presses the insertion portion of the spherical mandrel 29 of the pipe M.
【００３３】このとき、図３に示すように、両内側部材
９Ｂの突合わせ端部をクッション部材２１により支持し
て、パイプＭと該パイプＭ内に両側から各々挿入された
棒状心金２３との間に摩擦力を発生させ、この摩擦力で
前記両棒状心金２３を後退し難くし、これら棒状心金２
３によりパイプＭの曲げ部位のクッション部材２１側を
伸ばす。また、前記内側部材９Ｂを前記外側部材９Ａの
溝部１１に摺動自在に収容して、上記パイプＭの伸長
時、該パイプＭを両棒状心金２３の挿入状態のままで両
外側部材９Ａの溝部１１内で摺動させ、図３に矢印で示
すようにパイプＭを自由に伸長させる。更に、前記パイ
プＭの曲げ部位に挿入した球体状心金２９によりパイプ
Ｍの曲げ部位のクッション部材２１側が成形型２側に偏
位して該パイプＭが偏平になることがないように、その
曲げ加工中、前記パイプＭを拘束する。At this time, as shown in FIG. 3, the abutting ends of both inner members 9B are supported by the cushion member 21, and the pipe M and the rod-shaped mandrel 23 inserted into the pipe M from both sides are provided. A frictional force is generated between the rod-shaped mandrel 2 and the bar-shaped mandrel 23 is made difficult to retreat by this frictional force.
The cushion member 21 side of the bent portion of the pipe M is extended by 3. Further, the inner member 9B is slidably accommodated in the groove portion 11 of the outer member 9A, and when the pipe M is extended, the pipe M is inserted into the rod-shaped mandrel 23 and the outer member 9A is inserted. The pipe M is slid in the groove 11 to freely extend the pipe M as shown by an arrow in FIG. Further, the spherical mandrel 29 inserted in the bent portion of the pipe M prevents the cushion member 21 side of the bent portion of the pipe M from being displaced toward the molding die 2 side, so that the pipe M does not become flat. The pipe M is restrained during bending.
【００３４】このようにして、パイプＭが曲げ加工され
ると共に、これに伴って、内側部材９Ｂを各々収容した
外側部材９Ａの突合わせ端部がクッション部材２１によ
り支持されながら支持軸１０を中心として回動される。
パイプＭの曲げ加工完了時には、パイプＭの伸長と共に
棒状心金２３が後退することで該棒状心金２３に設けた
係合部２４と外側部材９Ａに設けた支持片２２との間に
隙間が生じ、該隙間において前記棒状心金２３にシリン
ダ２５の係止具２６が係合する。このため、パイプＭの
曲げ加工完了後、シリンダ２５のロッド引込み作動によ
り前記棒状心金２３をパイプＭ内から取り出すことがで
きる。In this way, the pipe M is bent, and along with this, the butted ends of the outer members 9A accommodating the inner members 9B are supported by the cushion member 21 while centering on the support shaft 10. Is rotated as.
When the bending process of the pipe M is completed, the rod-shaped mandrel 23 retracts as the pipe M extends, so that a gap is formed between the engaging portion 24 provided on the rod-shaped mandrel 23 and the support piece 22 provided on the outer member 9A. The locking tool 26 of the cylinder 25 is engaged with the rod-shaped mandrel 23 in the gap. Therefore, after completion of bending of the pipe M, the rod-shaped mandrel 23 can be taken out of the pipe M by the rod retraction operation of the cylinder 25.
【００３５】以上のように、パイプＭの曲げ部位のクッ
ション部材２１側を自由に伸長させると共に、前記パイ
プＭの曲げ部位における偏平を阻止することにより、曲
げ半径がパイプ外径より小さい曲げができることとな
り、一般市販品のパイプで十分に極小曲げも可能とな
る。As described above, by flexibly extending the cushion member 21 side of the bent portion of the pipe M and preventing the flatness at the bent portion of the pipe M, the bending radius can be bent smaller than the outer diameter of the pipe. Therefore, it is possible to make a very small bend with a commercially available pipe.
【００３６】この発明の効果試験は、パイプ外径Ｄ＝３
〜２４ｍｍ、肉厚ｔ＝０．６〜１．５ｍｍ、パイプの材
質は非鉄金属から合金鋼鉄等の鉄系、パイプの構造はシ
ームレス，二重巻き鋼管等、各種のパイプについて行っ
た。この結果、パイプに偏平や皺を生じさせることな
く、また内面めっきを施してあるときにはめっきの剥離
を生じることなく、更にパイプの曲げ部位を加熱するこ
となく、最大曲げ角度１１０°で最小曲げ半径Ｒ＝０．
３５Ｄ（Ｄ：パイプ外径）以下の極小曲げを行うことが
でき、Ｒ＝０．２Ｄの極小曲げも可能であることが分か
った。The effect test of the present invention is carried out by the pipe outer diameter D = 3.
.About.24 mm, wall thickness t = 0.6 to 1.5 mm, pipe material was nonferrous metal to iron steel such as alloy steel, and pipe structure was seamless, double wound steel pipe and other various pipes. As a result, without causing flatness or wrinkles on the pipe, peeling of the plating when inner surface plating is applied, and without heating the bent portion of the pipe, the maximum bending angle is 110 ° and the minimum bending radius is 110 °. R = 0.
It was found that a minimum bending of 35D (D: pipe outer diameter) or less can be performed, and a minimum bending of R = 0.2D is also possible.
【００３７】尚、上記実施例では、成形型２を上方に配
置し、受け部材９等を下方に配置したが、その配置関係
は例えば上下逆にしても良い。In the above embodiment, the molding die 2 is arranged above and the receiving member 9 and the like are arranged below, but the arrangement relationship may be reversed, for example.
【００３８】また、球体状心金は完全な球に限らず、曲
げによって楕円等、あるいは、成形後取りやすいように
棒の先端に球面が形成されているものでも良く、少なく
とも一部が球体状であれば良い。The spherical mandrel is not limited to a perfect sphere, but may be an ellipse or the like by bending, or one in which a spherical surface is formed at the tip of the rod so that it can be easily taken after molding, at least a part of which is spherical. If it is good.
【００３９】[0039]
【発明の効果】以上の通り、この発明は、パイプの内部
に、中央に球体状心金を位置させ、両側に各々棒状心金
を挿入しておき、支持治具に回動可能に設けられたパイ
プ挿入溝を有する一対の受け部材を前記パイプ挿入溝が
長手方向に連なるように突き合わせた状態で前記パイプ
を前記パイプ挿入溝に挿入し、前記パイプの前記球体状
心金の挿入部位を前記両受け部材の突合わせ端部間に対
応させた後、該両受け部材の突合わせ端部をクッション
部材により支持しながら、前記両受け部材の反対側から
前記パイプの球体状心金の挿入部位を成形型で押圧して
曲げ加工を行うため、両受け部材の突合わせ端部を成形
型の反対側からクッション部材により支持しながらパイ
プの球体状心金の挿入部位を成形型の押圧部により押圧
して、前記パイプを曲げ変形させ、これによってパイプ
と該パイプ内に両側から挿入された棒状心金との間に摩
擦力を発生させ、この摩擦力で前記棒状心金を後退し難
くし、これら棒状心金によりパイプの球体状心金の挿入
部位のクッション部材側を伸ばすことができ、かつ、こ
の伸びに伴いパイプを両棒状心金の挿入状態のまま両受
け部材のパイプ挿入溝内で摺動させて、該両受け部材で
抑えずに前記伸びを自由にすることができる。また、前
記パイプに挿入した球体状心金によりその挿入部位を曲
げ加工中パイプが偏平しないように拘束することができ
る。従って、従来と異なって１つの曲げ工程で曲げ半径
がパイプ外径より小さい曲げができ、極小曲げも可能と
なることから、加工作業の能率の向上が図れる。As described above, according to the present invention, the spherical mandrel is positioned in the center of the pipe, the rod-shaped mandrels are inserted on both sides, and the support jig is rotatably provided. The pair of receiving members having the pipe insertion groove are inserted into the pipe insertion groove in a state in which the pipe insertion groove is abutted so as to be continuous in the longitudinal direction, and the insertion portion of the spherical mandrel of the pipe is After making the abutting ends of both receiving members correspond to each other, while supporting the abutting ends of the both receiving members by a cushion member, the insertion portion of the spherical mandrel of the pipe from the opposite side of the both receiving members. Since the mold is pressed by the mold to perform the bending process, while supporting the butt ends of both receiving members from the opposite side of the mold with the cushion member, the insertion part of the spherical mandrel of the pipe is pressed by the pressing part of the mold. Press the pipe Bending deformation causes a frictional force to be generated between the pipe and the rod-shaped mandrel inserted into the pipe from both sides, and the frictional force makes it difficult for the rod-shaped mandrel to retreat. The cushion member side of the insertion portion of the spherical mandrel can be extended, and with this extension, the pipe is slid in the pipe insertion groove of both receiving members while the rod-shaped mandrel is inserted, The extension can be made free without restraining by both receiving members. Further, the spherical mandrel inserted into the pipe can restrain the insertion portion so that the pipe does not flatten during bending. Therefore, unlike the conventional case, the bending radius can be smaller than the pipe outer diameter in one bending step, and the minimum bending can be performed, so that the efficiency of the working operation can be improved.
【００４０】また、この発明は、一対の支持軸を備えた
支持治具と、前記両支持軸に各々回動自在に枢支される
と共に、パイプが挿入されるパイプ挿入溝を備え、各パ
イプ挿入溝が長手方向に連なるように互いの先端部が突
き合わされてセットされた一対の受け部材と、前記パイ
プ内に両側から挿入される一対の棒状心金と、前記支持
治具に対して相対的に接離するように設けられ、先端に
は略前記パイプの直径を有する円弧状の成形溝が形成さ
れた押圧部を備え、該押圧部によって前記パイプを押圧
する成形型とを有するパイプ曲げ加工装置において、前
記各受け部材を、前記支持軸に回動自在に枢支された溝
部を有する外側部材と前記パイプ挿入溝を有し前記外側
部材の溝部に摺動自在に収容された内側部材とで構成す
ると共に、前記両棒状心金間の前記パイプ内には球体状
心金を配設し、前記各外側部材の突合わせ端部を前記成
形型の反対側からクッション部材によって支持し、前記
パイプを前記球体状心金の位置にて前記押圧部により押
圧して曲げ加工を行うものであるため、前記パイプ曲げ
加工装置の各受け部材を外側部材と内側部材とで構成す
ると共に、各外側部材の突合わせ端部を成形型の反対側
から支持するクッション部材を付設する簡単な改造と、
前記両棒状心金間の前記パイプ内に挿入される球体状心
金の使用とで従来と同様に製作することができると共
に、上記パイプ曲げ加工方法を確実に実施できる。Further, the present invention comprises a support jig having a pair of support shafts, a pipe insertion groove rotatably supported by the support shafts, and a pipe insertion groove into which the pipes are inserted. A pair of receiving members that are set so that their distal ends abut against each other so that the insertion grooves are continuous in the longitudinal direction, a pair of rod-shaped cores that are inserted into the pipe from both sides, and a support jig Bending with a pressing die having a circular arc-shaped forming groove having substantially the same diameter as the pipe, and a forming die for pressing the pipe by the pressing portion. In the processing device, each receiving member has an outer member having a groove portion pivotally supported by the support shaft and an inner member having the pipe insertion groove and slidably accommodated in the groove portion of the outer member. And consists of both A spherical mandrel is arranged in the pipe between the cored mandrels, and the abutting ends of the outer members are supported by a cushion member from the opposite side of the molding die, and the pipe is the spherical mandrel. Since the bending is performed by pressing with the pressing portion at the position, each receiving member of the pipe bending apparatus is composed of an outer member and an inner member, and the abutting end portion of each outer member is formed. A simple modification to attach a cushion member that supports from the opposite side of the mold,
With the use of a spherical mandrel inserted into the pipe between the rod-shaped mandrels, the mandrel can be manufactured in a conventional manner, and the pipe bending method can be reliably performed.
【図１】（１） この発明の一実施例になるパイプ曲げ
加工装置の要部を示す（２）のＡ−Ａ線に沿う正断面図
である。 （２） 同要部を示す（１）のＢ−Ｂ線に沿う側断面図
である。FIG. 1 is a front sectional view taken along line AA of (2) showing a main part of a pipe bending apparatus according to an embodiment of the present invention. (2) It is a side sectional view taken along the line BB of (1) showing the main part.
【図２】図１（２）の側面図である。FIG. 2 is a side view of FIG. 1 (2).
【図３】図１に示すパイプ曲げ加工装置の要部の作用説
明図である。FIG. 3 is an operation explanatory view of a main part of the pipe bending apparatus shown in FIG.
【図４】同パイプ曲げ加工装置の作動前の状態を示す正
面図である。FIG. 4 is a front view showing a state before the operation of the pipe bending apparatus.
【図５】同パイプ曲げ加工装置の作動後の状態を示す正
面図である。FIG. 5 is a front view showing a state after the operation of the pipe bending apparatus.
【図６】従来例のパイプ曲げ加工装置を示す正面図であ
る。FIG. 6 is a front view showing a conventional pipe bending apparatus.
【図７】（１） 他の従来例のパイプ曲げ加工装置を示
す正面図である。 （２） 同パイプ曲げ加工装置の作動後の状態を示す正
面図である。FIG. 7 (1) is a front view showing another conventional pipe bending apparatus. (2) It is a front view showing a state after the operation of the pipe bending apparatus.
Ｍ パイプ １ 支持治具 ２ 成形型 ９ 受け部材 ９Ａ 外側部材 ９Ｂ 内側部材 １０ 支持軸 １１ 溝部 １３ パイプ挿入溝 ２１ クッション部材 ２３ 棒状心金 ２７ 押圧部 ２８ 成形溝 ２９ 球体状心金 M Pipe 1 Support jig 2 Mold 9 Receiving member 9A Outer member 9B Inner member 10 Support shaft 11 Groove portion 13 Pipe insertion groove 21 Cushion member 23 Rod-shaped mandrel 27 Pressing portion 28 Forming groove 29 Spherical mandrel
フロントページの続き (72)発明者 小松 孝一 静岡県裾野市上ヶ田52番地の１ 上日工業 株式会社内Front page continued (72) Inventor Koichi Komatsu 1 at 52 Kamigada, Susono City, Shizuoka Prefecture
Claims (2)
置させ、両側に各々棒状心金を挿入しておき、支持治具
に回動可能に設けられたパイプ挿入溝を有する一対の受
け部材を前記パイプ挿入溝が長手方向に連なるように突
き合わせた状態で前記パイプを前記パイプ挿入溝に挿入
し、前記パイプの前記球体状心金の挿入部位を前記両受
け部材の突合わせ端部間に対応させた後、該両受け部材
の突合わせ端部をクッション部材により支持しながら、
前記両受け部材の反対側から前記パイプの球体状心金の
挿入部位を成形型で押圧して曲げ加工を行うことを特徴
とするパイプ曲げ加工方法。1. A pair of pipes each having a spherical mandrel positioned in the center of the pipe, rod-shaped mandrels inserted on both sides, and a pipe insertion groove rotatably provided on a supporting jig. The pipe is inserted into the pipe insertion groove in a state where the receiving member is abutted so that the pipe insertion groove is continuous in the longitudinal direction, and the insertion portion of the spherical mandrel of the pipe is abutting end portions of the both receiving members. After making them correspond to each other, while supporting the abutting ends of the both receiving members by the cushion member,
A method for bending a pipe, characterized in that a portion for inserting the spherical mandrel of the pipe is pressed from a side opposite to the receiving members with a molding die to perform bending.
両支持軸に各々回動自在に枢支されると共に、パイプが
挿入されるパイプ挿入溝を備え、各パイプ挿入溝が長手
方向に連なるように互いの先端部が突き合わされてセッ
トされた一対の受け部材と、前記パイプ内に両側から挿
入される一対の棒状心金と、前記支持治具に対して相対
的に接離するように設けられ、先端には略前記パイプの
直径を有する円弧状の成形溝が形成された押圧部を備
え、該押圧部によって前記パイプを押圧する成形型とを
有するパイプ曲げ加工装置において、前記各受け部材
を、前記支持軸に回動自在に枢支された溝部を有する外
側部材と前記パイプ挿入溝を有し前記外側部材の溝部に
摺動自在に収容された内側部材とで構成すると共に、前
記両棒状心金間の前記パイプ内には球体状心金を配設
し、前記各外側部材の突合わせ端部を前記成形型の反対
側からクッション部材によって支持し、前記パイプを前
記球体状心金の位置にて前記押圧部により押圧して曲げ
加工を行うことを特徴とするパイプ曲げ加工装置。2. A support jig having a pair of support shafts, and a pipe insertion groove into which a pipe is inserted and which is rotatably supported by the support shafts, respectively. A pair of receiving members set so that their front ends abut against each other so as to be continuous in a direction, a pair of rod-shaped mandrel inserted into the pipe from both sides, and relatively contact with and separated from the supporting jig. A pipe bending apparatus having a pressing portion provided with a pressing portion in which an arc-shaped forming groove having a diameter of the pipe is formed at the tip, and the forming die pressing the pipe by the pressing portion, Each of the receiving members is composed of an outer member having a groove portion pivotally supported by the support shaft and an inner member having the pipe insertion groove and slidably accommodated in the groove portion of the outer member. Together with the pad between the rod-shaped mandrel. A spherical mandrel is disposed in the pipe, the abutting ends of the outer members are supported by a cushion member from the opposite side of the mold, and the pipe is pressed at the position of the spherical mandrel. A pipe bending apparatus characterized in that bending is performed by pressing by a section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717094A JP3444973B2 (en) | 1994-06-06 | 1994-06-06 | Pipe bending method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717094A JP3444973B2 (en) | 1994-06-06 | 1994-06-06 | Pipe bending method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07328726A true JPH07328726A (en) | 1995-12-19 |
| JP3444973B2 JP3444973B2 (en) | 2003-09-08 |
Family
ID=15424172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14717094A Expired - Lifetime JP3444973B2 (en) | 1994-06-06 | 1994-06-06 | Pipe bending method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3444973B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006043765A (en) * | 2004-06-29 | 2006-02-16 | Jfe Steel Kk | Method and apparatus for bending pipe |
| CN100386161C (en) * | 2004-02-09 | 2008-05-07 | 株式会社丰技研 | Method of bending pipe and apparatus therefor |
| CN102029309A (en) * | 2010-10-12 | 2011-04-27 | 大连大显精密轴有限公司 | Stamping method of longitudinal V-shaped slot of shaft workpiece |
| CN103008419A (en) * | 2012-12-12 | 2013-04-03 | 哈尔滨工业大学 | Forming device and forming method for pipe with small bending radius |
| JP2014028382A (en) * | 2012-07-31 | 2014-02-13 | Nisshin Steel Co Ltd | Bending method of metal pipe |
| JP2016078089A (en) * | 2014-10-20 | 2016-05-16 | 有限会社アルミテック | Elbow manufacturing device and manufacturing method |
| CN114393077A (en) * | 2021-12-23 | 2022-04-26 | 宁波润轴科技有限公司 | Circular tube bending equipment |
Families Citing this family (1)
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|---|---|---|---|---|
| KR102024875B1 (en) * | 2017-12-26 | 2019-09-24 | 정연덕 | Coaming manufacturing device and method thereof |
-
1994
- 1994-06-06 JP JP14717094A patent/JP3444973B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386161C (en) * | 2004-02-09 | 2008-05-07 | 株式会社丰技研 | Method of bending pipe and apparatus therefor |
| JP2006043765A (en) * | 2004-06-29 | 2006-02-16 | Jfe Steel Kk | Method and apparatus for bending pipe |
| JP4573643B2 (en) * | 2004-06-29 | 2010-11-04 | Ｊｆｅスチール株式会社 | Pipe bending machine |
| CN102029309A (en) * | 2010-10-12 | 2011-04-27 | 大连大显精密轴有限公司 | Stamping method of longitudinal V-shaped slot of shaft workpiece |
| JP2014028382A (en) * | 2012-07-31 | 2014-02-13 | Nisshin Steel Co Ltd | Bending method of metal pipe |
| CN103008419A (en) * | 2012-12-12 | 2013-04-03 | 哈尔滨工业大学 | Forming device and forming method for pipe with small bending radius |
| JP2016078089A (en) * | 2014-10-20 | 2016-05-16 | 有限会社アルミテック | Elbow manufacturing device and manufacturing method |
| CN114393077A (en) * | 2021-12-23 | 2022-04-26 | 宁波润轴科技有限公司 | Circular tube bending equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3444973B2 (en) | 2003-09-08 |
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