JP4843974B2 - Pipe bender machine core - Google Patents

Pipe bender machine core Download PDF

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JP4843974B2
JP4843974B2 JP2005088099A JP2005088099A JP4843974B2 JP 4843974 B2 JP4843974 B2 JP 4843974B2 JP 2005088099 A JP2005088099 A JP 2005088099A JP 2005088099 A JP2005088099 A JP 2005088099A JP 4843974 B2 JP4843974 B2 JP 4843974B2
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head
pipe
cored bar
pipe bender
rotating
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JP2006263793A (en
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博 田嶋
幸一 平野
幸宏 黒田
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Description

本発明は、管の曲げ加工を行うパイプベンダー加工機の芯金に関する。   The present invention relates to a core metal of a pipe bender machine for bending a pipe.

鋼管等の管の曲げ加工は、パイプベンダー加工機によって行われる。パイプベンダー加工機による管の曲げ加工方法を図５のパイプベンダー加工機の模式図を参照して説明する。パイプベンダー加工機５０は、被加工物である管５１を曲げ加工する装置であり、キャリッジ５４、プレッシャー５５、曲げダイ５６、及び曲げアーム５７を備える。   Bending of pipes such as steel pipes is performed by a pipe bender machine. A method of bending a pipe by a pipe bender processing machine will be described with reference to a schematic diagram of the pipe bender processing machine in FIG. The pipe bender processing machine 50 is a device for bending a pipe 51 that is a workpiece, and includes a carriage 54, a pressure 55, a bending die 56, and a bending arm 57.

まず、キャリッジ５４にて保持された管５１内に、一端に芯金５２が固定された芯棒５３を挿入する（図５（ａ））。芯金５２は、曲げ加工時の管断面形状の変形の防止、及び管内面の圧縮によるしわの発生の防止のために用いられるものである。次に、キャリッジ５４及びプレッシャー５５を図中左側に移動させることによって、管５１を曲げダイ５６及びプレッシャー５５によって拘束する。この状態で、キャリッジ５４及びプレッシャー５５を管５１とともに図中下方へ移動させながら、曲げアーム５７を旋回させることによって管５１の曲げ加工が行われる（図５（ｂ））。   First, a core bar 53 having a core metal 52 fixed at one end is inserted into the tube 51 held by the carriage 54 (FIG. 5A). The cored bar 52 is used for preventing deformation of the tube cross-sectional shape during bending and preventing wrinkles due to compression of the inner surface of the tube. Next, the carriage 51 and the pressure 55 are moved to the left side in the drawing to restrain the tube 51 by the bending die 56 and the pressure 55. In this state, the pipe 51 is bent by turning the bending arm 57 while moving the carriage 54 and the pressure 55 together with the pipe 51 downward in the drawing (FIG. 5B).

このとき、芯金５２は、管５１の曲げ部内に挿入されているため、管５１の曲げ加工時に、芯金５２と管５１の内面とが接触し摩擦が生じる。このため、摩擦が大きい部分では芯金５２に焼き付きが発生することがある。   At this time, since the cored bar 52 is inserted into the bent portion of the tube 51, the cored bar 52 and the inner surface of the tube 51 come into contact with each other when the tube 51 is bent, and friction occurs. For this reason, seizure may occur in the cored bar 52 in a portion where the friction is large.

この焼き付きは芯金の寿命低下につながる。また、芯金に焼き付きが発生した場合、管の曲げ部寸法に影響を及ぼすため、曲げ加工後に管の寸法精度の調整が必要になり、管の生産効率低下につながる。さらに、芯金の一部に焼き付きが発生した場合でも、芯金全体を交換しなければならないため、芯金の交換に伴う費用は高いものとなる。   This seizure leads to a reduction in the life of the cored bar. In addition, when seizure occurs in the metal core, the size of the bent portion of the pipe is affected, so that it is necessary to adjust the dimensional accuracy of the pipe after bending, leading to a reduction in the production efficiency of the pipe. Furthermore, even if seizure occurs in a part of the core metal, the entire core metal must be replaced, so that the cost associated with the replacement of the core metal is high.

特許文献１には、芯金円柱の先端に芯金駒を首振り可能に連結し、該芯金駒の回転胴部に同芯金駒の母材より低摩擦性・耐蝕性の溶着層を設けたパイプベンダー用の芯金が開示されている。しかし、このように溶着層を設けた場合でも、管からの応力や、管との摩擦が集中した部分では、芯金の焼き付きは避けられない。
特開２００１−１０５０３４ In Patent Document 1, a cored bar piece is connected to the tip of a cored bar cylinder so as to be swingable, and a welding layer having lower friction and corrosion resistance than the base metal of the cored bar piece is provided on the rotating body of the cored bar piece. A mandrel for a pipe bender is disclosed. However, even when the weld layer is provided in this way, the core metal is inevitably seized at a portion where stress from the tube and friction with the tube are concentrated.
JP 2001-105034 A

本発明は、上記の問題点に鑑みてなされたものであり、焼き付きが発生し難く、かつ、焼き付きが発生した場合でも交換に伴う費用が高くならない芯金を提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a mandrel that hardly causes seizure and does not increase the cost associated with replacement even when seizure occurs.

本発明は、被加工管の内部に挿入されるパイプベンダー加工機用の芯金であって、胴部と当該胴部先端に設けられた頭部とを備え、前記頭部は中空部を有し、前記胴部は、先端に前記中空部に挿通される凸軸部を有し、前記頭部は、芯金軸方向への移動を拘束する回転部保持機構によって前記胴部に回転可能に保持され、前記回転部保持機構は、前記頭部の芯金軸方向の移動を拘束する板状部材と、前記板状部材を挿通して前記胴部の前記凸軸部に締結され、前記板状部材を前記胴部に固定する固定部材と、を備えることを特徴とする。 The present invention is a core metal for a pipe bender processing machine to be inserted into a machined pipe, and includes a barrel portion and a head portion provided at a tip portion of the barrel portion, and the head portion has a hollow portion. The barrel portion has a convex shaft portion inserted into the hollow portion at the tip, and the head portion can be rotated to the barrel portion by a rotating portion holding mechanism that restrains movement in the core metal shaft direction. The rotating part holding mechanism is held by a plate-like member that restrains the movement of the head in the core metal axis direction, and is fastened to the convex shaft part of the body part through the plate-like member, And a fixing member for fixing the cylindrical member to the body portion .

本発明によれば、焼き付きが発生し難く、かつ焼き付きが発生した場合でも焼き付いた部分のみを交換することができるため、交換に伴う費用を抑えることができる。   According to the present invention, seizure hardly occurs, and even when seizure occurs, only the seized part can be replaced, so that the cost associated with the replacement can be suppressed.

以下、本発明の実施の形態を図面を参照して説明する。
（実施の形態１）
図１，図２を参照して本発明の実施の形態１である芯金１００について説明する。図１は芯金１００の斜視図であり、図２は芯金１００の断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
A cored bar 100 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the core metal 100, and FIG. 2 is a cross-sectional view of the core metal 100.

芯金１００は、芯棒（図示せず）の一端に固定され、曲げ加工時の管断面形状の変形の防止、及び管内面の圧縮によるしわの発生の防止のために、被加工管（図示せず）の内部に挿入されるパイプベンダー加工機用の芯金であり、胴部１と、胴部１に対して相対回転する頭部２と、頭部２の芯金１００の軸方向への移動を拘束する回転部保持機構３とを備える。   The cored bar 100 is fixed to one end of a cored bar (not shown), and in order to prevent deformation of the tube cross-sectional shape during bending and to prevent wrinkles due to compression of the inner surface of the tube (Fig. (Not shown) is a core metal for a pipe bender processing machine inserted into the body 1, the head part 2, the head 2 rotating relative to the body part 1, and the core metal 100 of the head 2 in the axial direction. And a rotating part holding mechanism 3 that restricts the movement of the rotating part.

胴部１は、円柱形状で、下端部１ａは胴部１の外径に比して径が小さい芯棒が取付けられるためテーパ形状となっている。胴部１の先端には、頭部２を回転可能に保持するための円柱状の凸軸部１ｂが、胴部１と同軸上に形成されている。なお、凸軸部１ｂは、胴部１の外径に比して径が小さい。   The trunk portion 1 has a cylindrical shape, and the lower end portion 1a has a tapered shape because a core rod having a smaller diameter than the outer diameter of the trunk portion 1 is attached. A cylindrical convex shaft portion 1 b for holding the head portion 2 rotatably is formed at the tip of the body portion 1 so as to be coaxial with the body portion 1. The convex shaft portion 1 b has a smaller diameter than the outer diameter of the body portion 1.

頭部２は、内周部に段部２ａを有する中空円柱形状で、外周面２ｂは先端に向かって湾曲した形状であり、中空部２ｃに胴部１の凸軸部１ｂが挿通される。このように、頭部２は、胴部１と同軸上に配置され、芯金１００の先端部を構成する。   The head portion 2 has a hollow cylindrical shape having a step portion 2a on the inner peripheral portion, the outer peripheral surface 2b has a shape curved toward the tip, and the convex shaft portion 1b of the trunk portion 1 is inserted into the hollow portion 2c. Thus, the head 2 is disposed coaxially with the trunk 1 and constitutes the tip of the core metal 100.

頭部２が胴部１の凸軸部１ｂに挿通された状態では、頭部２の外周面２ｂと胴部１の外周面１ｃとは、その境目に段差を生じることなく滑らかに連続した状態となる。   In a state where the head 2 is inserted through the convex shaft portion 1b of the trunk portion 1, the outer peripheral surface 2b of the head portion 2 and the outer peripheral surface 1c of the trunk portion 1 are smoothly continuous without producing a step at the boundary. It becomes.

回転部保持機構３は、頭部２の芯金１００軸方向の移動を拘束する板状部材としての座金４と、この座金４を胴部１に固定する固定部材としてのボルト５とからなる。座金４は、頭部２の中空部２ｃ内の段部２ａ上に配置される。ボルト５は、座金４を挿通して胴部１の凸軸部１ｂの中心のねじ穴１ｄに螺合する。なお、胴部１の先端にボルト５を螺合するための凸軸１ｂを設けたが、凸軸部１を設けず胴部１に直接ボルト５を螺合するように構成してもよい。この場合には、頭部２の内径とボルト５のねじ外径を略同一にすればよい。   The rotating portion holding mechanism 3 includes a washer 4 as a plate-like member that restrains the movement of the head 2 in the axial direction of the core 100 and a bolt 5 as a fixing member that fixes the washer 4 to the body 1. The washer 4 is disposed on the step 2 a in the hollow portion 2 c of the head 2. The bolt 5 is inserted through the washer 4 and is screwed into the screw hole 1 d at the center of the convex shaft portion 1 b of the body portion 1. In addition, although the convex shaft 1b for screwing the bolt 5 to the tip of the trunk portion 1 is provided, the bolt 5 may be directly screwed to the trunk portion 1 without providing the convex shaft portion 1. In this case, the inner diameter of the head 2 and the screw outer diameter of the bolt 5 may be made substantially the same.

これにより、頭部２は胴部１に対して相対回転可能となる。つまり、頭部２は、胴部１及び座金４とのそれぞれの間に僅かな隙間を有して配置されている。この隙間の寸法は０．１ｍｍ以内に設定される。   As a result, the head 2 can rotate relative to the body 1. That is, the head 2 is arranged with a slight gap between the body 1 and the washer 4. The size of this gap is set within 0.1 mm.

また、胴部１は、回転部である頭部２と非回転部である胴部１との隙間、及び芯金１００と被加工管との隙間に油等の潤滑剤を供給するための通路６を備える。通路６は、胴部１の軸心に沿って形成され図示しない潤滑剤供給部から潤滑剤が導入される大径通路７と、大径通路７から分岐する小径通路８とからなる。小径通路８は、頭部２と胴部１との隙間に潤滑剤を導入する第１の小径通路８ａと、芯金１００と被加工管との隙間に潤滑剤を導入するため胴部１の外周に開口する第２の小径通路８ｂとからなる。なお、芯金１００では、頭部２と胴部１との隙間、及び芯金１００と被加工管との隙間の双方に潤滑剤を供給する構成としたが、いずれか一方のみに潤滑剤を供給する構成も当然可能である。   The trunk portion 1 is a passage for supplying a lubricant such as oil to the gap between the head portion 2 which is a rotating portion and the trunk portion 1 which is a non-rotating portion, and the gap between the core metal 100 and the pipe to be processed. 6 is provided. The passage 6 includes a large-diameter passage 7 that is formed along the axial center of the body portion 1 and into which lubricant is introduced from a lubricant supply unit (not shown), and a small-diameter passage 8 that branches from the large-diameter passage 7. The small-diameter passage 8 has a first small-diameter passage 8a that introduces a lubricant into the gap between the head 2 and the trunk portion 1, and the trunk portion 1 because the lubricant is introduced into the gap between the core metal 100 and the pipe to be processed. It consists of a second small-diameter passage 8b that opens to the outer periphery. In the metal core 100, the lubricant is supplied to both the gap between the head 2 and the body 1 and the gap between the metal core 100 and the pipe to be processed. However, the lubricant is applied to only one of them. Of course, a configuration of supplying is also possible.

芯棒の先端に芯金１００を取付け、図４で示したように、芯金１００を被加工管内に挿入し被加工管の曲げ加工を行う場合、芯金１００の先端である頭部２が主に被加工管の内面と接触する。   When the core metal 100 is attached to the tip of the core bar and the core metal 100 is inserted into the tube to be processed and the tube to be processed is bent as shown in FIG. Mainly contacts the inner surface of the work tube.

しかし、頭部２を胴部１に対して相対回転可能に構成したため、被加工管の曲げ加工終了後、他の被加工管の曲げ加工を行う際には、頭部２を胴部１に対して回転させることができる。つまり、１本の被加工管の曲げ加工毎に胴部１に対する頭部２の相対位置が変わるため、頭部２と被加工管との接触部位は、被加工管の曲げ加工毎に異なることになる。これにより、頭部２と被加工管との接触による摩擦の発生が頭部２の周囲に分散されるため、特定の箇所へ摩擦が集中せず、焼き付きの発生が防止される。   However, since the head portion 2 is configured to be rotatable relative to the body portion 1, the head portion 2 is attached to the body portion 1 when bending the other work tube after the end of bending the work tube. Can be rotated. In other words, since the relative position of the head 2 with respect to the body 1 changes every time a single pipe is bent, the contact portion between the head 2 and the pipe to be processed varies depending on the bending of the pipe to be processed. become. As a result, the generation of friction due to the contact between the head 2 and the pipe to be processed is dispersed around the head 2, so that the friction does not concentrate on a specific location and the occurrence of seizure is prevented.

もし、頭部２に焼き付きが発生した場合でも、芯金の交換は、胴部１を含めた芯金１００全体ではなく、芯金１００の先端である頭部２のみでよいため、交換が非常に容易であり、交換に伴う費用も安く済む。   Even if seizure occurs in the head 2, the replacement of the core metal is not necessary because the replacement of the core metal 100 including the body portion 1 is limited to the head 2 at the tip of the core metal 100. And replacement costs are low.

さらに、胴部１に、頭部２と胴部１との隙間、及び芯金１００と被加工管との隙間に潤滑剤を供給するための大径通路７及び小径通路８を設けたため、頭部２は胴部１に対してスムーズに回転することができ、かつ、芯金１００と被加工管との摩擦も低減される。なお、頭部２が回転することによって、頭部２と胴部１との隙間に供給された潤滑剤は、頭部２と胴部１との隙間全体に行き渡る。   Furthermore, since the body 1 is provided with a large-diameter passage 7 and a small-diameter passage 8 for supplying a lubricant to the gap between the head 2 and the trunk 1 and the gap between the core metal 100 and the pipe to be processed, The part 2 can rotate smoothly with respect to the body part 1, and the friction between the core metal 100 and the pipe to be processed is also reduced. In addition, when the head 2 rotates, the lubricant supplied to the gap between the head 2 and the trunk 1 spreads over the entire gap between the head 2 and the trunk 1.

本実施の形態１では、頭部２を胴部１に保持させるため回転部保持機構３として座金４とボルト５を用いたが、それに限られるものではなく、頭部２が胴部１に対して相対回転可能であれば、どのような保持機構を用いてもよい。   In the first embodiment, the washer 4 and the bolt 5 are used as the rotating portion holding mechanism 3 in order to hold the head portion 2 on the trunk portion 1. Any holding mechanism may be used as long as relative rotation is possible.

（実施の形態２）
図３を参照して本発明の実施の形態２である芯金２００について説明する。図３は芯金２００の斜視図である。なお、前述した実施の形態１と同様の構成には、同一の符号を付する。 (Embodiment 2)
With reference to FIG. 3, a core metal 200 according to the second embodiment of the present invention will be described. FIG. 3 is a perspective view of the cored bar 200. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1 mentioned above.

芯金２００における芯金１００との相違点は、胴部１が回転する点である。芯金２００は、回転する頭部２と共に、軸部１ｅの周囲に回転自由に設けられた回転胴部９とを備える。   The difference between the cored bar 200 and the cored bar 100 is that the body 1 rotates. The cored bar 200 includes the rotating head portion 2 and a rotating body portion 9 that is freely rotatable around the shaft portion 1e.

回転胴部９は、円筒形状であり、軸部１ｅの周囲を覆うように軸部１ｅと同心に配置される。回転胴部９は、軸部１ｅとの間に僅かな隙間を有して配置され、その隙間の寸法は０．１ｍｍ以内に設定される。回転胴部９の芯金２００軸方向の移動は、頭部２及び軸部１ｅの段部１ｆによって拘束される。   The rotary body portion 9 has a cylindrical shape and is disposed concentrically with the shaft portion 1e so as to cover the periphery of the shaft portion 1e. The rotating body portion 9 is disposed with a slight gap between the shaft portion 1e and the size of the gap is set within 0.1 mm. The movement of the rotating body portion 9 in the axial direction of the cored bar 200 is restricted by the head portion 2 and the step portion 1f of the shaft portion 1e.

軸部１ｅの先端には、頭部２を回転可能に保持するための円柱状の凸軸部１ｂが、軸部１ｅと同軸上に形成され、頭部２の中空部２ｃに凸軸部１ｂが挿通される。このように、回転胴部９及び頭部２は、軸部１ｅと同軸上に、かつ軸部１ｅに対して相対回転可能に配置される。なお、凸軸部１ｂは、軸部１ｅの外径に比して径が小さい。   At the tip of the shaft portion 1e, a cylindrical convex shaft portion 1b for holding the head portion 2 rotatably is formed coaxially with the shaft portion 1e, and the convex shaft portion 1b is formed in the hollow portion 2c of the head portion 2. Is inserted. As described above, the rotary body portion 9 and the head portion 2 are arranged coaxially with the shaft portion 1e and relatively rotatable with respect to the shaft portion 1e. The convex shaft portion 1b has a smaller diameter than the outer diameter of the shaft portion 1e.

芯金２００は、芯金１００と同様に、回転部である頭部２及び回転胴部９と非回転部である軸部１ｅとの隙間に潤滑剤を導入する第１の小径通路８ａ、及び芯金２００と被加工管との隙間に潤滑剤を導入する第２の小径通路８ｂとを有する。芯金２００では、小径通路８ｂは、軸部１ｅと回転胴部９との隙間に潤滑剤を導入する役割も持つ。つまり、小径通路８ｂは、軸部１ｅに設けられた通路と、回転胴部９に設けられた通路とからなり、両者が連通している場合には、潤滑剤は芯金２００と被加工管との隙間に供給され、回転胴部９が回転し両者が連通していない場合には、潤滑剤は、軸部１ｅと回転胴部９との隙間に供給される。   As with the core metal 100, the core metal 200 includes a first small-diameter passage 8a that introduces a lubricant into the gap between the head portion 2 and the rotating body portion 9 that are rotating portions and the shaft portion 1e that is a non-rotating portion, and It has the 2nd small diameter channel | path 8b which introduce | transduces a lubricant into the clearance gap between the metal core 200 and a to-be-processed pipe. In the cored bar 200, the small diameter passage 8b also has a role of introducing a lubricant into the gap between the shaft portion 1e and the rotating body portion 9. That is, the small-diameter passage 8b is composed of a passage provided in the shaft portion 1e and a passage provided in the rotary body 9, and when both are in communication, the lubricant is the core metal 200 and the work tube. Is supplied to the gap between the shaft portion 1 e and the rotary drum portion 9, and the lubricant is supplied to the gap between the shaft portion 1 e and the rotary drum portion 9.

回転部として頭部２とともに回転胴部９を設けることによって、芯金２００の周囲は、全て回転部によって覆われることになるため、芯金２００の先端部だけでなく芯金２００の周囲の焼き付きの発生も防止することができる。また、芯金２００の周囲に焼き付きが発生した場合でも、回転胴部９を交換することができるため、交換が非常に容易であり、交換に伴う費用も安く済む。   By providing the rotating body 9 together with the head 2 as the rotating part, the entire periphery of the cored bar 200 is covered with the rotating part, so that not only the tip part of the cored bar 200 but also the periphery of the cored bar 200 is seized. Can also be prevented. Further, even if seizure occurs around the cored bar 200, the rotating body portion 9 can be replaced. Therefore, the replacement is very easy, and the cost associated with the replacement can be reduced.

芯金２００では、回転部保持機構３は頭部２の中空部２ｃ内にではなく、胴部１の凸軸部１ｂの先端に剥き出しの状態で配置するようにした。被加工管の曲げ部の曲率が小さい加工を行う場合には、このような構成でも可能となる。   In the cored bar 200, the rotating part holding mechanism 3 is arranged not in the hollow part 2c of the head part 2, but in a state of being exposed at the tip of the convex shaft part 1b of the body part 1. Such a configuration is also possible when processing is performed with a small curvature of the bent portion of the tube to be processed.

芯金２００は、頭部２と回転胴部９とを別体に設けたが、一体に成形するようにしてもよい。しかし、回転部は一体で設けるよりも分割して設けた方が、回転部の一部に焼き付きが発生した場合には、その部分だけを交換することができるという利点がある。   In the cored bar 200, the head 2 and the rotary body 9 are provided separately, but they may be formed integrally. However, when the rotating part is provided separately, there is an advantage that, when seizure occurs in a part of the rotating part, only that part can be replaced.

頭部２と回転胴部９とを一体に成形する場合、図４に示すように、軸部１ｅに、芯金２００の先端から下端まで延びる単一の筒状部材１０を回転自由に嵌合することも可能である。   When the head 2 and the rotary body 9 are formed integrally, as shown in FIG. 4, a single tubular member 10 extending from the tip to the lower end of the cored bar 200 is freely fitted to the shaft 1e. It is also possible to do.

本発明は上記の実施の形態に限定されずに、その技術的な思想の範囲内において種々の変更がなしうることは明白である。   The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

本発明の芯金は、パイプベンダー加工機に利用することができる。   The cored bar of the present invention can be used for a pipe bender processing machine.

本発明の実施の形態１における芯金１００を示す斜視図である。It is a perspective view which shows the metal core 100 in Embodiment 1 of this invention. 本発明の実施の形態１における芯金１００を示す断面図である。It is sectional drawing which shows the core metal 100 in Embodiment 1 of this invention. 本発明の実施の形態２における芯金２００を示す断面図である。It is sectional drawing which shows the core metal 200 in Embodiment 2 of this invention. 本発明の実施の形態２における芯金２００の他の形態を示す断面図である。It is sectional drawing which shows the other form of the core metal 200 in Embodiment 2 of this invention. パイプベンダー加工機による管の曲げ加工方法を示す模式図である。It is a schematic diagram which shows the bending method of the pipe | tube by a pipe bender processing machine.

符号の説明Explanation of symbols

５２，１００，２００ 芯金
１ 胴部
１ａ 下端部
１ｂ 凸軸部
１ｃ，２ｂ 外周面
１ｄ ねじ穴
１ｅ 軸部
１ｆ 段部
２ 頭部
２ａ 段部
２ｃ 中空部
３ 回転部保持機構
４ 座金
５ ボルト
６ 通路
７ 大径通路
８ 小径通路
９ 回転胴部
８ａ 第１の小径通路
８ｂ 第２の小径通路
５０ パイプベンダー加工機
５１ 管
５３ 芯棒 52, 100, 200 Core 1 Body 1a Lower end 1b Convex shaft 1c, 2b Outer peripheral surface 1d Screw hole 1e Shaft 1f Step 2 Head 2a Step 2c Hollow part 3 Rotating part holding mechanism 4 Washer 5 Bolt 6 Passage 7 Large-diameter passage 8 Small-diameter passage 9 Rotating body portion 8a First small-diameter passage 8b Second small-diameter passage 50 Pipe bender processing machine 51 Pipe 53 Core rod

Claims (4)

被加工管の内部に挿入されるパイプベンダー加工機用の芯金であって、
胴部と当該胴部先端に設けられた頭部とを備え、
前記頭部は中空部を有し、
前記胴部は、先端に前記中空部に挿通される凸軸部を有し、
前記頭部は、芯金軸方向への移動を拘束する回転部保持機構によって前記胴部に回転可能に保持され、
前記回転部保持機構は、
前記頭部の芯金軸方向の移動を拘束する板状部材と、
前記板状部材を挿通して前記胴部の前記凸軸部に締結され、前記板状部材を前記胴部に固定する固定部材と、を備える
ことを特徴とするパイプベンダー加工機用の芯金。 A cored bar for a pipe bender processing machine to be inserted into a processed pipe,
A torso and a head provided at the torso tip;
The head has a hollow portion;
The trunk portion has a convex shaft portion inserted into the hollow portion at the tip,
The head is rotatably held on the trunk by a rotating part holding mechanism that restricts movement in the core axis direction.
The rotating part holding mechanism is
A plate-like member that restrains movement of the head in the axial direction of the core,
A metal core for a pipe bender machine , comprising: a fixing member that is inserted through the plate-like member and fastened to the convex shaft portion of the barrel portion, and fixes the plate-like member to the barrel portion. . 前記胴部は、軸部と当該軸部の周囲に設けたれた回転胴部とを備え、
前記頭部及び前記回転胴部は、前記軸部に対して相対回転可能であることを特徴とする請求項１に記載のパイプベンダー加工機用の芯金。 The barrel portion includes a shaft portion and a rotating barrel portion provided around the shaft portion,
The metal core for a pipe bender machine according to claim 1, wherein the head and the rotating body are rotatable relative to the shaft. 前記頭部と前記回転胴部とが一体に成形されることを特徴とする請求項２に記載のパイプベンダー加工機用の芯金。 The cored bar for a pipe bender processing machine according to claim 2 , wherein the head and the rotary body are integrally formed. 前記胴部に、回転部と非回転部との隙間、又は芯金と前記被加工管との隙間もしくは双方に潤滑剤を供給するための通路を設けたことを特徴とする請求項１乃至請求項３のいずれか一に記載のパイプベンダー加工機用の芯金。 2. A passage for supplying a lubricant to a gap between a rotating part and a non-rotating part, or a gap between a cored bar and the pipe to be processed, or both, is provided in the body part. Item 4. A cored bar for a pipe bender processing machine according to any one of items 3 .
JP2005088099A 2005-03-25 2005-03-25 Pipe bender machine core Expired - Fee Related JP4843974B2 (en)

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CN104353713A (en) * 2014-11-06 2015-02-18 格力电器（武汉）有限公司 Pipe bending core rod
JP6710598B2 (en) 2016-07-12 2020-06-17 三菱重工業株式会社 Pipe material manufacturing method and mandrel

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JPS504346B1 (en) * 1970-07-16 1975-02-18
JP3425459B2 (en) * 1993-10-25 2003-07-14 臼井国際産業株式会社 Mandrel device
JP3835869B2 (en) * 1996-12-26 2006-10-18 プレス工業株式会社 Bending method for pipes and profiles
JP3783325B2 (en) * 1997-03-19 2006-06-07 アイシン精機株式会社 Pipe bending machine
JP2000117333A (en) * 1998-10-15 2000-04-25 Mitsubishi Electric Corp Device for cold bending of pipe and method therefor
JP2001205352A (en) * 2000-01-25 2001-07-31 Toyota Motor Corp Mandrel for bending of bellow tube

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