JP2767387B2 - Forming method of elbow metal pipe and forming apparatus used directly for its implementation - Google Patents
Forming method of elbow metal pipe and forming apparatus used directly for its implementationInfo
- Publication number
- JP2767387B2 JP2767387B2 JP28138094A JP28138094A JP2767387B2 JP 2767387 B2 JP2767387 B2 JP 2767387B2 JP 28138094 A JP28138094 A JP 28138094A JP 28138094 A JP28138094 A JP 28138094A JP 2767387 B2 JP2767387 B2 JP 2767387B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cylinder
- molding die
- unit base
- shaping
- 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.)
- Expired - Fee Related
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄肉パイプを小さい曲
率半径で曲げ加工してエルボ金属管を得る方法とその方
法実施のための装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for obtaining an elbow metal pipe by bending a thin pipe with a small radius of curvature and an apparatus for carrying out the method.
【０００２】[0002]
【従来の技術】所定長さの薄肉パイプを、パイプベンダ
−で表面に潰れや皺が生じない程度の曲率で曲げ加工し
た上、小さい曲率の屈折型面を有する下型及び上型で挟
持押圧した固定状態で、屈折管の両端からパンチ規制棒
を圧入して屈折管の内面を整形する、小さい曲率半径の
エルボ金属管を得る方法が、既に提案されている（特開
平６−１１４４５４）。2. Description of the Related Art A thin pipe of a predetermined length is bent by a pipe bender with a curvature that does not cause crushing or wrinkling on the surface, and is pressed by a lower mold and an upper mold having a refracting surface with a small curvature. A method of obtaining an elbow metal tube having a small radius of curvature by press-fitting a punch regulating rod from both ends of the refraction tube in the fixed state to shape the inner surface of the refraction tube has already been proposed (JP-A-6-114454).
【０００３】そしてこれよりは、「第１の曲率で曲げ加
工されたパイプを、第２の曲率で所定の屈折角に屈折し
た型面を有する下型及び上型で、押圧、型成形すること
により、屈折部が第２の屈折率で所定角に屈折された屈
折管を形成し、該屈折管の両端から、屈折管内にパンチ
規制棒を圧入して、屈折管の外側を内面から整形するこ
とにより、屈折部分に座屈や表面に潰れや皺のない高品
質の屈折管を、簡単に製造することができる」（同明細
書の段落番号００１３）との作用効果を生ずるものとさ
れる。[0003] From now on, "pressing and molding a pipe bent at a first curvature with a lower mold and an upper mold having a mold surface bent at a predetermined angle of refraction at a second curvature. Thus, the refraction portion forms a refraction tube that is refracted at a predetermined angle with the second refractive index, and a punch restricting rod is pressed into the refraction tube from both ends of the refraction tube to shape the outside of the refraction tube from the inner surface. This makes it possible to easily manufacture a high-quality refraction tube without buckling of the refraction portion and without crushing or wrinkling on the surface ”(paragraph 0013 of the same specification). .
【０００４】しかしながら、この先行技術にあっては、
第２の型成形においてパイプを下型及び上型で押圧固定
状態に把束した上で、パンチ規制棒（芯金）を同時に圧
入して整形を行うものであるから、成形、整形時の材料
変化に対する逃げ空間がなく、どうしても材料の変化に
無理を生じ、極端な肉薄部分、皺、亀裂等の発生が避け
られず、さらにチャッキングの痕も残ってしまう難点が
ある。However, in this prior art,
In the second mold forming, the pipe is bundled in a pressed and fixed state by the lower mold and the upper mold, and then the punch regulating rod (core metal) is simultaneously press-fitted for shaping. There is no escape space for the change, so that the change of the material is inevitably forced, and the occurrence of extremely thin portions, wrinkles, cracks, etc. is unavoidable, and there is a problem that a trace of chucking remains.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、金型、材料
であるパイプを、完全な固定状態において成形乃至整形
することを止め、水平四分割した成形金型の成形加工圧
に応じて材料が伸びる方向に移動できるようにし、また
屈折部を金型より開放させて成形、整形時の逃げ空間を
確保し、さらに整形を片側ずつ二段階に行うことによ
り、先行技術の難点を解消した極めて精巧な製品を得る
方法及びその方法実現のための装置を提供しようとする
ものである。SUMMARY OF THE INVENTION It is an object of the present invention to stop forming or shaping a mold or a pipe made of a material in a completely fixed state, and to set a material according to a forming pressure of a horizontally divided four-piece forming mold. Can be moved in the direction in which it extends, and the refraction part is opened from the mold to secure the clearance space at the time of molding and shaping, and furthermore, shaping is performed in two steps for each side, eliminating the difficulties of the prior art. An object of the present invention is to provide a method for obtaining a sophisticated product and an apparatus for realizing the method.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明のエルボ金属管の成形加工方法は、パイプベ
ンダ−で大きな曲率半径に一次加工したパイプを、その
曲率部を開放し且つ成形加圧によるパイプの伸び方向に
移動できるようにした水平方向四分割の成形金型に挟持
させつつ、パイプの頭打ちしたＹ方向一端よりＹ方向整
形芯金を挿入させるとともにこれに瞬時遅らせてＸ方向
他端よりＸ方向整形芯金を挿入させて突き合わせ、最後
に各成形金型と整形芯金とを同時作動させて全体矯正す
ることを特徴とする。In order to achieve the above object, a method of forming an elbow metal pipe according to the present invention is to form a pipe which has been primarily processed to a large radius of curvature by a pipe bender, by opening a curvature portion thereof and forming the pipe. Insert the Y-directional shaping core from one end of the pipe in the Y-direction, while holding it in the horizontal four-part molding die that can be moved in the direction of extension of the pipe by pressurization. The X-shaped shaping core is inserted from the other end and butted, and finally, the molding dies and the shaping core are simultaneously operated to perform overall correction.
【０００７】またその成形加工方法を実現するため、Ｙ
方向軌道２に搭載され、突出しシリンダ３で移動するＹ
方向ユニットベ−ス１に、内側に管状のパイプの頭打ち
ストッパ−５を固定するとともに外側にカムロ−ラ１０
を突設させた静態成形金型４とシリンダ７に作動される
動態成形金型６を備え、両成形金型４、６の間には、シ
リンダ８に作動され前記管状のパイプ頭打ちストッパ−
５を経てパイプ内径をストロ−クするＹ方向整形芯金９
を備え、In order to realize the molding method, Y
Y mounted on the directional track 2 and moved by the protruding cylinder 3
A directional unit base 1 is provided with a tubular pipe cuff stopper 5 fixed inside and a cam roller 10 fixed outside.
And a dynamic forming die 6 actuated by a cylinder 7 provided with a protruding portion, and a tubular head-stopping stopper which is actuated by a cylinder 8 between the two forming dies 4 and 6.
5, a Y-shaped shaping core 9 that strokes the inside diameter of the pipe
With
【０００８】他方、Ｘ方向軌道１６に搭載され、前記カ
ムロ−ラ１０が当接されるカム斜面１７を備えたＸ方向
ユニットベ−ス１５に、シリンダ１８によりＹ方向に作
動されるとともに該Ｘ方向ユニットベ−ス１５と連動し
てＸ方向に移動する動態成形金型１２と静態成形金型１
９を備え 両成形金型１２、１９の間には、シリンダ２
０に作動されパイプ内径をストロ−クするＸ方向整形芯
金１４を備え、該Ｘ方向整形芯金１４の側方より屈曲延
設したア−ム２１の先端に装着したカムロ−ラ２２を前
記Ｙ方向ユニットベ−ス１の外縁に突設したカム斜面１
１と当接させてＸ方向整形芯金１４の突出し動作を前記
Ｙ方向整形芯金９の突出し動作より瞬時遅らせるように
して、エルボ金属管の成形加工装置を構成する。On the other hand, an X-direction unit base 15 having a cam slope 17 mounted on an X-direction track 16 and contacting the cam roller 10 is actuated in a Y-direction by a cylinder 18 and is moved in the X-direction. Dynamic molding die 12 and static molding die 1 that move in the X direction in conjunction with unit base 15
The cylinder 2 is provided between the two molding dies 12 and 19.
And a cam roller 22 attached to the tip of an arm 21 bent and extended from the side of the X-direction shaping core 14. Cam slope 1 protruding from the outer edge of Y-direction unit base 1
1 to make the projecting operation of the X-shaped shaping mandrel 14 instantaneously delay from the projecting operation of the Y-direction shaping mandrel 9 to constitute an elbow metal pipe forming apparatus.
【０００９】[0009]
【作用】次に装置の作業手順に沿って、作用を説明す
る。 １） 図１の状態で、パイプＰを成形金型４に沿って、
その頭端を頭打ちストッパ−５に突当てた状態でセット
すると、シリンダ７が作動して成形金型４、６でパイプ
Ｐをキャッチする（図４）。Next, the operation will be described in accordance with the operation procedure of the apparatus. 1) In the state of FIG.
When the head is set with its head end abutting against the stopper 5, the cylinder 7 operates to catch the pipe P with the molding dies 4, 6 (FIG. 4).
【００１０】２） 次の瞬間、シリンダ３によりユニッ
トベ−ス１を突き動かし、パイプＰを成形金型１９に突
き当ててからシリンダ１８を作動させ、即ち四つの成形
金型４，６，１２，１９でパイプＰをキャッチすると、
シリンダ８と２０が作動して夫々の整形芯金９と１４が
パイプＰに侵入してくる（このとき夫々の整形芯金９と
１４が異時動作することについては後の（５）で説
明）。これによりパイプＰの内側コ−ナ−が屈曲成形さ
れる。このときパイプＰの最大曲げ半径部位は成形金型
からは開放されている（図４、図５）。2) At the next moment, the unit base 1 is moved by the cylinder 3 to push the pipe P against the molding die 19 and then the cylinder 18 is operated, that is, the four molding dies 4, 6, 12,. When you catch the pipe P at 19,
The cylinders 8 and 20 operate to cause the respective shaped cores 9 and 14 to enter the pipe P. (The fact that the respective shaped cores 9 and 14 operate abnormally at this time will be described later in (5). ). As a result, the inner corner of the pipe P is bent. At this time, the maximum bending radius portion of the pipe P is open from the molding die (FIGS. 4 and 5).
【００１１】３） （２）と同時にユニットベ−ス１に
取付けられたカムロ−ラ１０が、ユニットベ−ス１５に
取付けられたカム斜面１７をスライドして、該ユニット
ベ−ス１５及び成形金型１２，１９を外側へ押出す。こ
れは（２）の動作でパイプＰのＸ方向外端が引張られる
際の逃げを確保するためである（図６）。3) At the same time as (2), the cam roller 10 attached to the unit base 1 slides on the cam slope 17 attached to the unit base 15, and the unit base 15 and the molding die 12 are moved. , 19 are pushed out. This is to secure a clearance when the outer end of the pipe P in the X direction is pulled in the operation (2) (FIG. 6).
【００１２】４） （２）と同時にパイプＰ内に挿入さ
れた整形芯金９がパイプＰの内径Ｐ1、Ｐ3を整形加工す
る（図５）。このときパイプＰの最大曲げ半径部位は整
形金型から開放されていること先と同様である。。4) Simultaneously with (2), the shaping core 9 inserted into the pipe P shapes the inner diameters P1, P3 of the pipe P (FIG. 5). At this time, the maximum bending radius portion of the pipe P is open from the shaping mold in the same manner as above. .
【００１３】５） さらに（２）と同時に、シリンダ２
０が作動して、整形芯金１４がパイプＰの内径に挿入さ
れるが、このときユニットベ−ス１側に取り付けられた
カム斜面１１と、整形芯金１４の側部より延設された屈
曲ア−ム２１の先端に装着されたロ−ラ２２とのカム作
用により、前記整形芯金１４のパイプＰへの侵入が僅か
に遅らされる。従って実際には（２）と同時にではな
く、次の瞬間ということになる。そしてこれにより内径
Ｐ2、Ｐ3が整形加工される（図６）。このようにパイプ
の内径は、時差により片側ずつ整形加工されるため材料
の変化に無理がなく、又パイプＰの最大曲げ半径部位は
整形金型から開放されているので、材料の逃げ空間が確
保される。5) At the same time as (2), the cylinder 2
0 operates to insert the shaping mandrel 14 into the inner diameter of the pipe P. At this time, the cam slope 11 attached to the unit base 1 side and the bend extending from the side of the shaping mandrel 14. The intrusion of the shaped core 14 into the pipe P is slightly delayed by the cam action with the roller 22 mounted on the tip of the arm 21. Therefore, actually, it is not the same as (2) but the next moment. Thus, the inner diameters P2 and P3 are shaped (FIG. 6). As described above, the inner diameter of the pipe is shaped one by one due to the time difference, so that the material can be easily changed. In addition, since the maximum bending radius of the pipe P is opened from the shaping mold, a clearance space for the material is secured. Is done.
【００１４】６） そして最後に（次の瞬間）全シリン
ダが同時作動し、パイプＰ全体の歪みを矯正する。6) Finally (at the next moment), all the cylinders operate simultaneously to correct the distortion of the entire pipe P.
【００１５】[0015]
【発明の効果】このように本発明においては、金型、被
加工物であるパイプＰを完全な固定状態において成形乃
至整形するのではなく、成形金型４，６，１２，１９が
水平四分割されて、Ｘ、Ｙ方向移動ユニットベ−ス１
（４と６），１５（１２と１９）に取付けられ、それら
成形金型が成形加工圧に合せてパイプＰの伸びる方向に
移動するとともに最大曲げ半径部に成形金型を有しない
空間があって成形及び整形時におけるパイプの逃げ空間
を確保してあり、さらにパイプＰはＹ方向、Ｘ方向それ
ぞれの方向にて片側ずつ二段階に整形された上、最後に
Ｘ、Ｙ方向同時に全体矯正が加えられるから、材料の変
化に無理を生じることがなく、材料に肉薄部分、皺、亀
裂、変形が生じない。そしてチャッキングの痕も残らな
い、極めて精巧な製品を得られる。As described above, in the present invention, instead of forming or shaping the mold and the pipe P to be processed in a completely fixed state, the forming dies 4, 6, 12, and 19 are horizontally Divided, X, Y direction moving unit base 1
(4 and 6) and 15 (12 and 19), the molding dies move in the direction in which the pipe P extends in accordance with the molding pressure, and there is a space without the molding dies at the maximum bending radius. An escape space for the pipe during molding and shaping is secured, and the pipe P is shaped in two steps, one side in each of the Y and X directions, and finally the entire straightening is performed simultaneously in the X and Y directions. Since it is added, the change of the material does not cause a change, and the material does not have a thin portion, wrinkles, cracks, or deformation. And you can get extremely elaborate products with no trace of chucking.
【００１６】また図７の製品比較によって明らかなよう
に、成形金型４に頭打ちストッパ−５を設けてあるの
で、パイプＰの両外端が不定に伸びる（Ｌ2は一定では
ない）先行技術に対し、パイプＰの頭端が突き当てられ
るため、Ｙ方向の縮み率（Ｌ4）を一定にすることがで
きるから、所望規格製品が得られる利点が加わる。As is apparent from the comparison of the products in FIG. 7, since the forming die 4 is provided with the stoppers 5 at the top, both outer ends of the pipe P extend indefinitely (L2 is not constant). On the other hand, since the head end of the pipe P is abutted, the shrinkage ratio (L4) in the Y direction can be kept constant, and therefore, an advantage that a desired standard product can be obtained is added.
【００１７】[0017]
【装置の実施例】図１において、１がＹ方向軌道２に搭
載され、突出しシリンダ３で移動するＹ方向ユニットベ
−スで、図２の（ロ）にも示されるように管状のパイプ
頭突当てストッパ−５を固定した静態成形金型４とシリ
ンダ７に作動される動態成形金型６が備えられる。そし
て前記両成形金型４、６の間には、シリンダ８に作動さ
れ、前記管状のパイプ頭打ちストッパ−５を経てパイプ
内径をストロ−クするＹ方向整形芯金９が備えられる。
また前記静態成形金型４の外縁には後に説明するＸ方向
動態成形金型１２，１９を突放すカムロ−ラ１０が突設
されている。In FIG. 1, reference numeral 1 denotes a Y-direction unit base mounted on a Y-direction track 2 and moved by a protruding cylinder 3, and as shown in FIG. A static molding die 4 to which a contact stopper 5 is fixed and a dynamic molding die 6 operated by a cylinder 7 are provided. A Y-shaped shaping core 9 which is actuated by a cylinder 8 and strokes the inside diameter of the pipe through the tubular pipe cuff stopper 5 is provided between the two forming dies 4 and 6.
At the outer edge of the static molding die 4, a cam roller 10 for projecting the X-direction dynamic molding dies 12, 19, which will be described later, is provided.
【００１８】次に１５がＸ方向軌道１６に搭載され、前
記カムロ−ラ１０が当接されるカム斜面１７を備えたＸ
方向ユニットベ−スで、図２の（イ）にも示されるよう
にシリンダ１８によりＹ方向に作動されるとともに前記
Ｘ方向ユニットベ−ス１５と連動してＸ方向に移動する
動態成形金型１２と静態成形金型１９が備えられる。そ
して前記両成形金型１２、１９の間には、シリンダ２０
に作動され、パイプ内径をストロ−クするＸ方向整形芯
金１４が備えられ、このＸ方向整形芯金１４の側方より
屈曲延設したア−ム２１の先端に装着したカムロ−ラ２
２が前記Ｙ方向ユニットベ−ス１側に突設されたカム斜
面１１と当接されて、Ｘ方向整形芯金１４の突出し動作
を前記Ｙ方向整形芯金９の突出し動作より瞬時遅らせる
仕組みである。Next, 15 is mounted on an X-direction track 16 and is provided with a cam slope 17 to which the cam roller 10 comes into contact.
As shown in FIG. 2A, the dynamic molding die 12 is operated in the Y direction by a cylinder 18 and moves in the X direction in conjunction with the X direction unit base 15 as shown in FIG. A static molding die 19 is provided. A cylinder 20 is provided between the molding dies 12 and 19.
The X-shaped shaping core 14 is provided to actuate the inner diameter of the pipe. The cam roller 2 is attached to the tip of an arm 21 bent and extended from the side of the X-direction shaping core 14.
2 is in contact with a cam slope 11 protruding from the Y-direction unit base 1 to momentarily delay the protruding operation of the X-directional shaping core 14 from the protruding operation of the Y-direction shaping core 9. .
【図１】装置の要部平面図FIG. 1 is a plan view of a main part of an apparatus.
【図２】装置要部の分解平面図FIG. 2 is an exploded plan view of a main part of the apparatus.
【図３】四分割の成型金型の各斜視図FIG. 3 is a perspective view of a four-part molding die.
【図４】パイプをキャッチさせた状態の平面図FIG. 4 is a plan view showing a state where a pipe is caught.
【図５】成形、整形の中間作動状態を示す平面図FIG. 5 is a plan view showing an intermediate operation state of molding and shaping.
【図６】成形、整形の最終作動状態を示す平面図FIG. 6 is a plan view showing a final operation state of molding and shaping.
【図７】（イ）が第１の曲率で曲げ加工したパイプの、
（ロ）が先行技術により最終加工したパイプ（エルボ）
の、（ハ）が本発明により最終加工したパイプの各縦断
側面図FIG. 7A shows a pipe bent at a first curvature.
(B) Pipe (elbow) finished by prior art
(C) is a longitudinal side view of each pipe finally processed according to the present invention.
１ Ｙ方向ユニットベ−ス ２ Ｙ方向軌道 ３ 突出しシリンダ ４ 静態成形金型 ５ パイプ頭打ちストッパ− ６ 動態成形金型 ７ シリンダ ８ シリンダ ９ Ｙ方向整形芯金 １０ カムロ−ラ １１ カム斜面 １２ 動態成形金型 １４ Ｘ方向整形芯金 １５ Ｘ方向ユニットベ−ス １６ Ｘ方向軌道 １７ カム斜面 １８ シリンダ １９ 静態成形金型 ２０ シリンダ ２１ ア−ム ２２ カムロ−ラ Ｐ パイプ DESCRIPTION OF SYMBOLS 1 Y direction unit base 2 Y direction track 3 Projection cylinder 4 Static molding die 5 Pipe heading stopper 6 Dynamic molding die 7 Cylinder 8 Cylinder 9 Y direction shaping core 10 Cam roller 11 Cam slope 12 Dynamic molding die 14 X-direction shaped core 15 X-direction unit base 16 X-direction track 17 Cam slope 18 Cylinder 19 Static mold 20 Cylinder 21 Arm 22 Cam roller P Pipe
Claims (2)
を、曲率部を開放し且つ成形加圧によるパイプの伸び方
向に移動できるようにした水平方向四分割の成形金型に
挟持させつつパイプの頭打ちしたＹ方向一端よりＹ方向
整形芯金を挿入させるとともにこれに瞬時遅らせてＸ方
向他端よりＸ方向整形芯金を挿入させ、最後に各成形金
型と整形芯金とを同時作動させて全体矯正することを特
徴とするエルボ金属管の成形加工方法。1. A pipe which is primarily processed to have a large radius of curvature is clamped in a horizontal four-piece molding die which has a curvature portion opened and can be moved in the direction of extension of the pipe by molding pressure. Insert the Y-shaped shaping core from one end in the Y-direction, insert the X-shaping core from the other end in the X-direction with a momentary delay, and simultaneously operate each molding die and shaping core simultaneously. A method for forming and processing an elbow metal tube, comprising straightening.
リンダ（３）で移動するＹ方向ユニットベ−ス（１）
に、内側に管状のパイプの頭打ちストッパ−（５）を固
定するとともに外側にカムロ−ラ（１０）を突設させた
静態成形金型（４）とシリンダ（７）に作動される動態
成形金型（６）を備え、両成形金型（４）、（６）の間
には、シリンダ（８）に作動され前記管状のパイプ頭突
当てストッパ−（５）を経てパイプ内径をストロ−クす
るＹ方向整形芯金（９）を備え、他方Ｘ方向軌道（１
６）に搭載され、前記カムロ−ラ（１０）が当接される
カム斜面（１７）を備えたＸ方向ユニットベ−ス（１
５）に、シリンダ（１８）によりＹ方向に作動されると
ともに該Ｘ方向ユニットベ−ス（１５）と連動してＸ方
向に移動する動態成形金型（１２）と静態成形金型（１
９）を備え、両成形金型（１２）、（１９）の間には、
シリンダ（２０）に作動されパイプ内径をストロ−クす
るＸ方向整形芯金（１４）を備え、該Ｘ方向整形芯金
（１４）の側方より屈曲延設したア−ム（２１）の先端
に装着したカムロ−ラ（２２）を前記Ｙ方向ユニットベ
−ス（１）の外縁に突設したカム斜面（１１）と当接さ
せてＸ方向整形芯金（１４）の突出し動作を前記Ｙ方向
整形芯金（９）の突出し動作より瞬時遅らせるようにし
て成る請求項１のエルボ金属管の成形加工方法の実施に
使用する成形加工装置。2. A Y-direction unit base (1) mounted on a Y-direction track (2) and moved by a protruding cylinder (3).
In addition, a static molding die (4) having a tubular pipe head stopper (5) fixed inside and a cam roller (10) projected outside and a dynamic molding die operated by a cylinder (7). A mold (6) is provided, and between the two molding dies (4) and (6), the inner diameter of the pipe is stroked through the tubular pipe head stopper (5) operated by the cylinder (8). The Y-directional shaped core (9), while the X-directional orbit (1
6) and an X-direction unit base (1) having a cam slope (17) with which the cam roller (10) comes into contact.
5) A dynamic molding die (12) and a static molding die (1) which are operated in the Y direction by a cylinder (18) and move in the X direction in conjunction with the X direction unit base (15).
9), and between the molding dies (12) and (19),
An X-direction shaped core (14) which is actuated by a cylinder (20) to stroke the inside diameter of a pipe, and a tip of an arm (21) bent and extended from a side of the X-direction shaped core (14). The cam roller (22) mounted on the Y-direction unit base (1) is brought into contact with a cam slope (11) protruding from the outer edge of the Y-direction unit base (1) so that the X-direction shaping mandrel (14) projects in the Y-direction. 2. A forming apparatus for use in carrying out the method of forming an elbow metal pipe according to claim 1, wherein the forming operation is instantaneously delayed from the projecting operation of the shaping core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28138094A JP2767387B2 (en) | 1994-10-20 | 1994-10-20 | Forming method of elbow metal pipe and forming apparatus used directly for its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28138094A JP2767387B2 (en) | 1994-10-20 | 1994-10-20 | Forming method of elbow metal pipe and forming apparatus used directly for its implementation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08117857A JPH08117857A (en) | 1996-05-14 |
| JP2767387B2 true JP2767387B2 (en) | 1998-06-18 |
Family
ID=17638337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28138094A Expired - Fee Related JP2767387B2 (en) | 1994-10-20 | 1994-10-20 | Forming method of elbow metal pipe and forming apparatus used directly for its implementation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2767387B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511499A (en) * | 2014-12-26 | 2015-04-15 | 新乡市万和过滤技术股份公司 | Automatic circle checking machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3000017B1 (en) | 1999-01-21 | 2000-01-17 | 株式会社三五 | Pipe material bending method |
| JP4914962B2 (en) * | 2005-07-28 | 2012-04-11 | 株式会社 クニテック | Pipe manufacturing method |
| CN115228979B (en) * | 2022-09-22 | 2022-12-13 | 潍坊市瑞轩管业有限公司 | Pipe fitting rounding device applied to water supply and drainage pipe fitting production line |
-
1994
- 1994-10-20 JP JP28138094A patent/JP2767387B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511499A (en) * | 2014-12-26 | 2015-04-15 | 新乡市万和过滤技术股份公司 | Automatic circle checking machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08117857A (en) | 1996-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0763758B2 (en) | Method for manufacturing a tapered pipe whose axis is bent from a plate material | |
| JP2767387B2 (en) | Forming method of elbow metal pipe and forming apparatus used directly for its implementation | |
| JP5561323B2 (en) | Work forming method and work forming apparatus | |
| US7237423B1 (en) | Apparatus for stretch forming blanks | |
| JP3000017B1 (en) | Pipe material bending method | |
| JPH0238287B2 (en) | ||
| JP3205105B2 (en) | Manufacturing method of deformed curved pipe | |
| JP5380847B2 (en) | Work forming method and work forming apparatus | |
| JPH0732076A (en) | Manufacture of cylindrical member for vehicle structure | |
| JP4270921B2 (en) | Bottomed tube and method for forming the same | |
| JP2001205350A (en) | Manufacturing method for tube stock for hydroforming and pipe bender | |
| JP6327319B2 (en) | Metal tube manufacturing method and apparatus | |
| CN113319172B (en) | Method for eliminating bending of flanging vertical wall of high Jiang Ban stamping part | |
| JP3449491B2 (en) | How to bend a metal tube with a small radius of curvature | |
| JPH07164067A (en) | Manufacture of pipe with uneven thickness | |
| JP3962156B2 (en) | Clip molding method and clip molding apparatus | |
| JP4914962B2 (en) | Pipe manufacturing method | |
| JPH0651211B2 (en) | Can barrel manufacturing method | |
| US4149399A (en) | Method of forming tubes or pipes | |
| JP4546592B2 (en) | Metal pipe bending method and metal bent pipe | |
| JPS59163024A (en) | Production of curved pipe material and press device thereof as well as formed product | |
| JP2002143952A (en) | Roll hemming device, and roll hemming method using it | |
| JP4110016B2 (en) | Method for forming metal expanded molded product having uneven hollow portion | |
| JP4259075B2 (en) | Method and apparatus for forming hydroforming material tube | |
| JP3835869B2 (en) | Bending method for pipes and profiles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |