JP4286613B2 - Joint structure and molding method thereof - Google Patents

Joint structure and molding method thereof Download PDF

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JP4286613B2
JP4286613B2 JP2003291177A JP2003291177A JP4286613B2 JP 4286613 B2 JP4286613 B2 JP 4286613B2 JP 2003291177 A JP2003291177 A JP 2003291177A JP 2003291177 A JP2003291177 A JP 2003291177A JP 4286613 B2 JP4286613 B2 JP 4286613B2
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pipe
flange member
hole
pipe end
clamp
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JP2005061492A (en
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茂 黒田
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株式会社オーツカ
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  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Description

本発明は、フランジ継ぎ手を構成するフランジ部材を備えたパイプ連結用継ぎ手部構造及びその成形方法に関する。 The present invention relates to a pipe coupling joint structure including a flange member that constitutes a flange joint and a molding method thereof .

図８及び図９は、従来のフランジ継ぎ手の雌側を示す。図に示すように、フランジ継ぎ手１は、フランジ部材２とパイプ３とで構成され、フランジ部材２には継ぎ手１の接続面４側から背面７側を貫通する貫通孔５を形成している。貫通孔５は、接続面４側に接続口６を形成し、背面７側にパイプ口８を形成している。このパイプ口８は、パイプ３の先端部を挿入しろう付け１５により、フランジ部材２とパイプ３とを固着している。フランジ部材２の貫通孔５の側部には、ネジ孔９を形成している。 8 and 9 show the female side of a conventional flange joint. As shown in the figure, the flange joint 1 is composed of a flange member 2 and a pipe 3, and the flange member 2 is formed with a through hole 5 penetrating from the connection surface 4 side to the back surface 7 side of the joint 1. The through hole 5 has a connection port 6 formed on the connection surface 4 side and a pipe port 8 formed on the back surface 7 side. In the pipe port 8, the flange member 2 and the pipe 3 are fixed to each other by inserting the tip of the pipe 3 and brazing 15. A screw hole 9 is formed on the side of the through hole 5 of the flange member 2.

他方、図１０に示すように、雄側フランジ継ぎ手１０は、フランジ部材１１にボス１２を突出させ、ボス１２と反対側のフランジ部材１１の面には、パイプ３ａを挿通させてかつフランジ部材１１に固着している。フランジ部材１１の側部には貫通孔１３を形成している。このような、フランジ継ぎ手１，１０は、雄側フランジ継ぎ手１０のボス１２を雌側フランジ継ぎ手１の接続口６に挿入し、ボルト１４により両フランジ部材２，１１を締結することにより両フランジ継ぎ手１，１０を連結している。   On the other hand, as shown in FIG. 10, the male flange joint 10 has the boss 12 protruded from the flange member 11, the pipe 3 a is inserted through the surface of the flange member 11 opposite to the boss 12, and the flange member 11. It is stuck to. A through hole 13 is formed in a side portion of the flange member 11. The flange joints 1 and 10 are constructed by inserting the boss 12 of the male flange joint 10 into the connection port 6 of the female flange joint 1 and fastening both the flange members 2 and 11 with bolts 14. 1 and 10 are connected.

特開平１１−１４１７６０号公報Japanese Patent Laid-Open No. 11-141760 特開２０００−１２０９５２号公報Japanese Patent Laid-Open No. 2000-120952

しかしながら、上述した雌側フランジ継ぎ手１は、フランジ部材２とパイプ３の接続部をろう付け１５により固定している。この際、ろう付け１５が不完全であると接続口６を介して、ろう付け不完全部からガス漏れ（若しくは液漏れ）が生じる。ろう付け１５を行う場合、図９に示すパイプ３の先端部をフランジ部材２の接続口６に挿入させるので、そのパイプ３の挿入長さｈだけ、フランジ部材２の全体のフランジ高さＨ１が大きくなり、材料費の部品コストが上昇する。図１０に示す雌側フランジ継ぎ手１を雄側フランジ継ぎ手１０と接続して配設した場合に、狭い箇所や部品の込み入った場所にフランジ高さの大きいフランジ継ぎ手１を配設するようなときは、フランジ部材２が他の部材と干渉することがある。強度さえ維持できれば、フランジ部材２は、小型化することが望ましい。さらには、フランジ継ぎ手１の製造工程において、ろう付け作業に手間と費用がかかっていた。   However, in the female flange joint 1 described above, the connecting portion between the flange member 2 and the pipe 3 is fixed by brazing 15. At this time, if the brazing 15 is incomplete, gas leakage (or liquid leakage) occurs from the incompletely brazed portion via the connection port 6. When brazing 15 is performed, the tip of the pipe 3 shown in FIG. 9 is inserted into the connection port 6 of the flange member 2, so that the entire flange height H1 of the flange member 2 is equal to the insertion length h of the pipe 3. It becomes larger and the parts cost of material cost rises. When the female flange joint 1 shown in FIG. 10 is connected to the male flange joint 10 and the flange joint 1 having a large flange height is disposed in a narrow place or a place where a part is crowded. The flange member 2 may interfere with other members. As long as the strength can be maintained, the flange member 2 is desirably downsized. Furthermore, in the manufacturing process of the flange joint 1, it takes time and effort to braze.

本発明はこのような事情に鑑みてなされたもので、フランジ継ぎ手を成形により製造する際に、費用を削減するとともに、作業を簡単に行うことができる継ぎ手部構造及び成形方法を提供することにある。 The present invention has been made in view of such circumstances, and provides a joint part structure and a molding method capable of reducing costs and easily performing operations when manufacturing a flange joint by molding. is there.

本発明の継ぎ手部構造は、上記目的を達成するために、貫通孔を有し、該貫通孔にパイプ端部を背面側から接続側に挿通させた状態で該パイプ端部に固着されたフランジ部材を備え、被接続管部に接続した前記パイプ端部を、前記フランジ部材を介して前記被接続管部側に連結可能である継ぎ手部構造において、前記フランジ部材は、前記貫通孔の接続側に拡孔部が形成されており、該貫通孔に、前記パイプ端部を挿通した状態で、該パイプ端部が、軸方向のパンチ加工で拡径されることにより、前記パイプ端部の外周面が前記貫通孔の内面に圧接され、かつ、前記パイプの先端部が、前記フランジ部材の接続側拡孔部内に拡開されて拡開部が形成されるとともに、前記フランジ部材の背面側で前記パイプの余肉が前記パイプの外周面から突出して突出部が形成され、これらの拡開部と突出部とで前記フランジ部材が挟着されている。 Flange joint portion structure of the present invention, in order to achieve the above object, the has a through hole, is fixed to the pipe end in a state of being inserted into the connecting side pipe end into the through hole from the back side In the joint part structure comprising a member and connecting the pipe end connected to the connected pipe part to the connected pipe part side via the flange member, the flange member is connected to the through hole and reaming portion are formed, the through hole, while inserting the pipe end, by the pipe end is expanded by a punch processing of the axially outer periphery of the pipe end surface is pressed against the inner surface of the through hole, and the tip portion of the pipe, together with the expanding portion is formed by expanding in the connection side reaming portion of said flange member, the back side of the flange member collision excess thickness of the pipe from the outer peripheral surface of the pipe Projecting portion is formed, said flange member is pinched between the protrusion these expansion opening portion.

本発明の継ぎ手部の成形方法は、上記目的を達成するために、パイプ端部に固着されたフランジ部材を含む継ぎ手部であって、前記フランジ部材が、その貫通孔に前記パイプ端部を背面側から接続側に挿通させた状態で固着されるような継ぎ手部の成形方法において、前記フランジ部材の貫通孔の接続側および背面側に予め拡孔部を形成しておき、前記パイプ端部をクランプから突出させた状態で、前記クランプにより前記パイプを拘持し、前記クランプから突出した前記パイプ端部を、前記フランジ部材の貫通孔に挿通した状態で、前記パイプ端部に軸方向にパンチを圧入し、該パンチにより前記パイプ端部を拡径しかつその内面を成形することにより、前記パイプ端部の外周面を前記貫通孔の内面に圧接させ、かつ、前記パイプの先端部を、前記フランジ部材の接続側拡孔部内に拡開させて拡開部を形成するとともに、前記フランジ部材の背面側で前記パイプの余肉を前記パイプの外周面から前記背面側拡孔部内に突出させて突出部を形成し、これらの拡開部と突出部とで前記フランジ部材が挟着されるようにして、前記パイプ端部に前記フランジ部材を固着することを特徴とする。 In order to achieve the above object, a method for forming a joint portion according to the present invention is a joint portion including a flange member fixed to a pipe end portion, and the flange member has a back surface in which the pipe end portion is placed in the through hole. in joint portions forming method, such as is fixed in a state of being inserted from the side to the connection side, the previously formed reaming portion to the connection side and the back side of the through hole of the flange member, the pipe end while being protruded from the clamp, hanged contracture the pipe by the clamp, punch the pipe end portion projecting from the clamp, while inserted into the through hole of the flange member, the axial direction to the pipe end press-fitted, by forming the inner surface of the enlarged diameter Shikatsuso the pipe end by the punch, the outer peripheral surface of the pipe end is pressed against the inner surface of the through hole, and the pipe of the tip The flange member is expanded in the connection side reaming Internal of to form the expansion opening portion, the excess thickness of the pipe at the rear side of the flange member in the rear-side reaming portion from the outer peripheral surface of the pipe It is protruded to form a protrusion, the flange member and the protruding portion of these expansion opening portion so as to be pinched, characterized by securing the flange member to said pipe end.

前記クランプとして、前記フランジ部材の背面側に隣接した拘持部の周囲に拡孔部を有するクランプを用い、前記フランジ部材の背面側拡孔部と前記クランプ側拡孔部とを合わせた空隙部に、前記パイプの余肉を突出させることができる。また、前記フランジ部材の背面側に前記拡孔部を形成せず、前記クランプとして、前記フランジ部材の背面側に隣接した拘持部の周囲に拡孔部を有するクランプを用い、該クランプ側拡孔部にのみ前記パイプの余肉を突出させることもできる。 As the clamp, a gap having a widened portion around a holding portion adjacent to the back side of the flange member is used , and a gap portion combining the back side widened portion and the clamp side widened portion of the flange member to, Ru can be projected excess thickness of the pipe. Further, the not forming the reaming portion on the back side of the flange member, as the clamp, using a clamp having a reaming portion around the catching portion adjacent to the rear side of the flange member, the clamp-side expansion it is also possible to only protrude excess thickness of the pipe in the hole.

本発明の継ぎ手部構造は、上記構成により、軸方向へのパンチ加工のみでパイプ端部に対するフランジ部材の固着および継ぎ手部の成形を行え、製造コストを削減するうえで有利である。フランジ部材が、拡径されたパイプ端部の全周に亘る拡開部と突出部とで挟着されることで、簡素な構造でありながらも、充分な連結強度が得られる。また、パイプの接続口を他の継ぎ手部と直接、接続することができるので、流体の漏れを防止するうえで有利である。 With the above-described configuration , the joint portion structure of the present invention is advantageous in reducing the manufacturing cost because the flange member can be fixed to the pipe end portion and the joint portion can be formed only by punching in the axial direction. The flange member is sandwiched between the expanded portion and the protruding portion over the entire circumference of the expanded pipe end, so that sufficient connection strength can be obtained even with a simple structure. Further, since the connection port of the pipe can be directly connected to another joint portion, it is advantageous in preventing fluid leakage.

また、上記継ぎ手部構造において、前記フランジ部材は、前記貫通孔の背面側に拡孔部が形成されており、前記パイプの余肉が前記背面側拡孔部内に突出して前記突出部が形成されている態様では、成形時における余肉部の形成をより効率的に行え、フランジ部材に対する保持力を向上するうえでも有利である。 Further, in the joint portion structure, the flange member is formed with an enlarged portion on a back side of the through hole , and an excess portion of the pipe projects into the rear side enlarged portion to form the projecting portion. In the embodiment, it is possible to more efficiently form the surplus portion at the time of molding, which is advantageous in improving the holding force for the flange member.

本発明は、上記成形方法を採用したことにより、軸方向へのパンチ加工による成形工程のみでパイプ端部に対するフランジ部材の固着および継ぎ手部の成形を行え、成形工程が簡素化されるとともに、ろう付け工程が不要になるので、製造コストの低減および製造時間の短縮に有利である。 By adopting the above molding method, the present invention can fix the flange member to the pipe end and mold the joint portion only by the molding process by punching in the axial direction. Since the attaching process is not necessary, it is advantageous in reducing the manufacturing cost and the manufacturing time.

また、上記成形方法において、前記クランプとして、前記フランジ部材の背面側に隣接した拘持部の周囲に拡孔部を有するクランプを用い、前記フランジ部材の背面側拡孔部と前記クランプ側拡孔部とを合わせた空隙部に、前記パイプの余肉を突出させるようにすれば、余肉部がフランジ部材側のみならず、クランプ側にも形成されることから余肉をより大きくすることができ、パイプのフランジ部材に対する保持力がより大きくなる。 In the above molding method, as the clamp, using a clamp having a reaming portion around the catching portion adjacent to the rear side of the flange member, the rear side reaming portion and the clamping side of the flange member reaming the gap portion of the combined and parts, be caused to protrude excess thickness of the pipe, the excess thickness portion is not flange member side only, is possible to further increase the excess material since it is also formed on the clamping side This can increase the holding force of the pipe against the flange member .

以下、本発明の実施の形態における継ぎ手部構造及び成形方法について図面を参照しながら説明する。なお、背景技術と同じ名称であるものについて、同一の符号を付して説明する。また、図１０に示す雄側フランジ継ぎ手１０は、変更がないのでそのまま雄側フランジ継ぎ手のみ図１０の符号を用いて説明する。
図１は、本発明に係る継ぎ手部構造を採用したフランジ継ぎ手１であり、図２Ａは、継ぎ手を形成する前のフランジ部材２の平面図であり、図２Ｂは、図２ＡのＸ−Ｘ断面図である。
フランジ継ぎ手１は、フランジ部材２とパイプ３とで構成され、図２Ｂに示すように、フランジ部材２にはフランジ継ぎ手１の接続面４側から背面７側を貫通する貫通孔５を形成している。貫通孔５は、接続面４側開口に段状の段差（２段）を形成した接続側拡孔部１６を形成し、フランジ部材２の背面７側には、貫通孔５の開口に位置させて、図２Ｂの円Ｙ内に示すように、テーパ状に貫通孔５の開口側を拡径した背面側拡孔部１７を形成している。フランジ部材２の貫通孔５の側部には、接続面４から背面へ貫通するネジ孔９を形成している。 Hereinafter, a joint part structure and a molding method according to an embodiment of the present invention will be described with reference to the drawings. In addition, what has the same name as the background art will be described with the same reference numerals. Further, since the male flange joint 10 shown in FIG. 10 is not changed, only the male flange joint will be described using the reference numerals in FIG.
FIG. 1 is a flange joint 1 employing the joint portion structure according to the present invention, FIG. 2A is a plan view of the flange member 2 before forming the joint, and FIG. 2B is a cross-sectional view taken along line XX of FIG. FIG.
The flange joint 1 is composed of a flange member 2 and a pipe 3. As shown in FIG. 2B, the flange member 2 is formed with a through hole 5 penetrating from the connection surface 4 side to the back surface 7 side of the flange joint 1. Yes. The through-hole 5 is formed with a connection-side enlarged portion 16 having a stepped step (two steps) formed in the opening on the connection surface 4 side, and is located on the back surface 7 side of the flange member 2 at the opening of the through-hole 5. Then, as shown in a circle Y in FIG. 2B, a back-side enlarged hole portion 17 is formed by expanding the diameter of the opening side of the through hole 5 in a tapered shape. A screw hole 9 penetrating from the connection surface 4 to the back surface is formed in a side portion of the through hole 5 of the flange member 2.

図１に示すように、パイプ３はパイプ３の先端部がフランジ部材２の接続面４と面一であり、先端側が雄側フランジ継ぎ手１０のボス１２が挿入可能なように、ボス径に合わせてパイプ３の基端側（非成形部）よりも拡径したボス挿入孔２０を形成している。また、ボス挿入孔２０の先端部はフレア１８を形成し、フレア１８は拡孔部１６の段差面上を、先端側が開く方向に裾拡がりに拡径している。他方、フランジ部材２の背面７側は、貫通孔５にある背面側拡孔部１７に位置させて、図１の円Ｚに示すように、三角形状の余肉１９を形成している。したがって、フランジ部材２は、貫通孔５の両端の位置で、一端側がフレア１８により他端側が余肉１９によりフランジ部材２を挟着するようにして固定している。また、フレア１８と接続側拡孔部１６の接合面及び余肉１９と背面側拡孔部１７の接合面を成形時に密着するように形成し、かつ、フレア１８と余肉１９間に挟着されたフランジ部材２が抜けるのを防止する。こうして、フランジ部材２は、パイプ３に固定される。   As shown in FIG. 1, the pipe 3 has a boss diameter adjusted so that the tip of the pipe 3 is flush with the connection surface 4 of the flange member 2 and the boss 12 of the male flange joint 10 can be inserted at the tip. The boss insertion hole 20 having a diameter larger than that of the base end side (non-molded portion) of the pipe 3 is formed. Moreover, the front-end | tip part of the boss insertion hole 20 forms the flare 18, and the flare 18 is expanded on the level | step difference surface of the enlarged-hole part 16 so that the front end side may open in the skirt direction. On the other hand, the rear surface 7 side of the flange member 2 is positioned in the rear surface side enlarged portion 17 in the through hole 5 to form a triangular extra wall 19 as shown by a circle Z in FIG. Therefore, the flange member 2 is fixed at both ends of the through-hole 5 so that the flange member 2 is sandwiched by the flare 18 on one end side and the extra wall 19 on the other end side. In addition, the joining surface of the flare 18 and the connection side enlarged portion 16 and the surplus surface 19 and the joining surface of the back side enlarged portion 17 are formed so as to adhere to each other at the time of molding, and are sandwiched between the flare 18 and the extra thickness 19 This prevents the flange member 2 from being pulled out. Thus, the flange member 2 is fixed to the pipe 3.

このような、雌側フランジ継ぎ手１は、図１に示すように、パイプ３が貫通孔５の全体に挿通させていることから、パイプ３の先端部が雄側フランジ継ぎ手１０のボス１２のボス挿入孔２０となり、背景技術の図９Ｂに示すように、ボス１２の接続口６とパイプ３を挿入するパイプ口８を別個に設ける必要がない。すなわち、本実施の形態では、背景技術のパイプ口８とボス接続口６とが共通化されている。よって、本実施の形態では、フランジ部材２の接続面４から背面７までの高さＨ２を従来よりも短くできる。また、パイプ３のフレア１８が雄側フランジ継ぎ手１０のボス１２と直接、接続されるので、従来のようにろう付けの不良個所のガス抜けを解消できる。   As shown in FIG. 1, such a female flange joint 1 has the pipe 3 inserted through the entire through hole 5, so that the tip of the pipe 3 is the boss of the boss 12 of the male flange joint 10. As shown in FIG. 9B of the background art, there is no need to separately provide the connection port 6 of the boss 12 and the pipe port 8 into which the pipe 3 is inserted. That is, in the present embodiment, the pipe port 8 and the boss connection port 6 of the background art are shared. Therefore, in this Embodiment, height H2 from the connection surface 4 of the flange member 2 to the back surface 7 can be made shorter than before. Further, since the flare 18 of the pipe 3 is directly connected to the boss 12 of the male flange joint 10, it is possible to eliminate gas leakage at a location where the brazing is defective as in the prior art.

以下、上述した継ぎ手部の成形工程について説明する。
図３は、フランジ継ぎ手１を成形するためのアウタダイス２５とパンチ２８を示し、図４Ａ〜Ｃは、フランジ継ぎ手１を成形するための第１工程の手順を示す。
図４Ａに示すクランプ２１の拘持部２２でパイプ３を拘持し、図４Ｂに示すように、パイプ３の先端部をフランジ部材２の厚さよりも僅かに大きい長さだけ分だけ、クランプ２１から突出させている。クランプ２１は、パイプ３が突出する面に、フランジ部材２の押当て面２３を有し、この押当て面２３側の拘持部２２に、拘持部２２を拡径したボス成形部２４を形成している。このボス成形部２４の径はフランジ部材２の貫通孔５に一致させている。 Hereinafter, the above-described joint portion forming step will be described.
FIG. 3 shows the outer die 25 and the punch 28 for forming the flange joint 1, and FIGS. 4A to 4C show the procedure of the first step for forming the flange joint 1.
Hanged contracture pipe 3 at the catching portion 22 of the clamp 21 shown in FIG. 4A, as shown in FIG. 4B, the distal end portion of the pipe 3 only slightly larger length than the thickness of the flange member 2 min by a clamp 21 It protrudes from . Clamp 21 is a plane pipe 3 projects have Pushing surface 23 of the flange member 2, the catching portion 22 of the Pushing surface 23 side, a boss forming portion 24 which is enlarged the catching portion 22 Forming. The diameter of the boss forming portion 24 is matched with the through hole 5 of the flange member 2.

フランジ部材２は、アウタダイス２５の保持座２６にセットする。図３に示すように、そのアウタダイス２５は、筒状の本体２７内にパンチ２８を配設し、本体２７の軸方向に摺動が可能である。また、アウタダイス２５の周部には、本体２７の軸方向に長いスリット孔２９を上下２箇所に形成している。このスリット孔２９には、ネジ形状のストッパ３０が挿通され、ストッパ３０はパンチ２８の周壁部に螺着している。よって、パンチ２８は、スリット孔２９の長さだけ摺動ストロークを有する。パンチ２８の後端部には、バネ座３１を形成し、バネ３２を本体２７の後端とバネ座３１の間に伸張状態で設けている。よって、成形時にパンチ２８を前方に移動した後、無負荷にすると、パンチ２８は後方の待機位置に戻る。   The flange member 2 is set on the holding seat 26 of the outer die 25. As shown in FIG. 3, the outer die 25 is provided with a punch 28 in a cylindrical main body 27, and can slide in the axial direction of the main body 27. In addition, slit holes 29 that are long in the axial direction of the main body 27 are formed at two locations on the periphery of the outer die 25. A screw-shaped stopper 30 is inserted into the slit hole 29, and the stopper 30 is screwed to the peripheral wall portion of the punch 28. Therefore, the punch 28 has a sliding stroke by the length of the slit hole 29. A spring seat 31 is formed at the rear end of the punch 28, and a spring 32 is provided in an extended state between the rear end of the main body 27 and the spring seat 31. Therefore, when the punch 28 is moved forward during molding and then unloaded, the punch 28 returns to the rear standby position.

パンチ２８は先端側から基端側に、テーパ部３４を挟んで、先端側に小径部３５が形成され、テーパ部３４の後端側に中径部３６が形成され、基端側が大径部３７となっている。小径部３５は、パイプ３の基準径（非成形部）と実質的に同じ径であり、中径部３６は図１に示すボス挿入孔２０よりも僅かに小さい径である。大径部３７は、アウタダイス２５の内径と実質的に一致させている。
図５は、図４Ｂの円Ｗの拡大図である。図に示すように、フランジ部材２とクランプ２１との当接面、すなわち、フランジ部材２の貫通孔５の全周囲には、貫通孔５の開口側が拡径するテーパ状の背面側拡孔部１７を形成し、これに対向するクランプ２１の拘持部２２（ボス成形部２４）の全周囲には、拘持部２２の開口側に拡径するテーパ状の拡孔部３８を形成している。 The punch 28 has a tapered portion 34 sandwiched from the distal end side to the proximal end side, a small diameter portion 35 is formed on the distal end side, an intermediate diameter portion 36 is formed on the rear end side of the tapered portion 34, and the proximal end side is a large diameter portion. 37. The small diameter portion 35 has substantially the same diameter as the reference diameter (non-molded portion) of the pipe 3, and the medium diameter portion 36 has a diameter slightly smaller than the boss insertion hole 20 shown in FIG. The large diameter portion 37 is substantially matched with the inner diameter of the outer die 25.
FIG. 5 is an enlarged view of the circle W in FIG. 4B. As shown in the figure, a taper-shaped back side expanded portion in which the diameter of the opening side of the through hole 5 is increased around the contact surface between the flange member 2 and the clamp 21, that is, the entire periphery of the through hole 5 of the flange member 2. 17 is formed on the entire periphery of the holding part 22 (boss forming part 24) of the clamp 21 opposite to this, and a taper-shaped enlarged hole part 38 having a diameter increasing toward the opening side of the holding part 22 is formed. Yes.

このような構成により、図４Ａに示すように、フランジ部材２をアウタダイス２５の保持座２６の上に保持し、次いで、図４Ｂに示すように、フランジ部材の貫通孔５にパイプ３の先端部を挿通させ、フランジ部材２の背面７をクランプ２１の押当て面２３に当接させる。この状態では、パンチ２８の待機状態で、パイプ３の先端部とパンチ２８の小径部３５が対向した位置に配置される。こうした状態で、パンチ２８をパイプ３側に打撃してスライドさせる。すると、図４Ｃに示すように、パイプ３の先端部が、パンチ２８のテーパ部３４及び中径部３６に対応する形状に拡径される。   4A, the flange member 2 is held on the holding seat 26 of the outer die 25, and then, as shown in FIG. 4B, the end portion of the pipe 3 is inserted into the through hole 5 of the flange member. And the rear surface 7 of the flange member 2 is brought into contact with the pressing surface 23 of the clamp 21. In this state, in the standby state of the punch 28, the tip end portion of the pipe 3 and the small diameter portion 35 of the punch 28 are arranged at positions facing each other. In this state, the punch 28 is struck and slid to the pipe 3 side. Then, as shown in FIG. 4C, the diameter of the tip of the pipe 3 is expanded to a shape corresponding to the tapered portion 34 and the medium diameter portion 36 of the punch 28.

次に、フランジ継ぎ手１を成形するための第２工程の手順を示す。
図６Ａに示すように、第１工程で成形したパイプ３及びパイプ３を保持しているクランプ２１をそのまま連続して第２工程で使用する。第２工程で用いるパンチ３９は、先端側から小径部４１、テーパ部４２、中径部４３、フレア形成部４４及び基部４５から構成される。小径部４１はパイプ３の非成形部と実質的に同径であり、テーパ部４２は第１工程で形成されたパイプ３のテーパ部４６に対応する形状であり、中径部４３は、雄側フランジ継ぎ手１０のボス１２部（図１０参照）と実質的に同径であり、中径部４３の径は、図６Ａに示す現状のパイプ３の拡径部４７よりも僅かに大きく形成している。パンチ３９のフレア成形部４４は、図２Ｂに示すように、パイプ３の先端部がフランジ部材２の接続側拡孔部１６の段差面に沿うような形状に形成されている。 Next, the procedure of the 2nd process for shape | molding the flange joint 1 is shown.
As shown in FIG. 6A, the pipe 3 formed in the first step and the clamp 21 holding the pipe 3 are continuously used in the second step. The punch 39 used in the second step includes a small-diameter portion 41, a tapered portion 42, a medium-diameter portion 43, a flare forming portion 44, and a base portion 45 from the tip side. The small diameter portion 41 has substantially the same diameter as the non-molded portion of the pipe 3, the tapered portion 42 has a shape corresponding to the tapered portion 46 of the pipe 3 formed in the first step, and the medium diameter portion 43 has a male diameter portion 43. It is substantially the same diameter as the boss 12 of the side flange joint 10 (see FIG. 10), and the diameter of the middle diameter portion 43 is slightly larger than the enlarged diameter portion 47 of the current pipe 3 shown in FIG. 6A. ing. As shown in FIG. 2B, the flare forming portion 44 of the punch 39 is formed in a shape such that the tip portion of the pipe 3 is along the stepped surface of the connection-side expanded portion 16 of the flange member 2.

このような構成により、図６Ｂ及びＣに示すように、パンチ３９をパイプ３に向かって打ち込む。この際、パンチ３９の中径部４３は、パイプ３の先端側の拡径部４７よりも径が大きいので、図７Ａに示すように、パイプ３の内周面を拡管する。すると、パイプ３が矢印に示すように、パイプ３の軸方向に圧縮力が加わる。
さらにパンチ３９が前進すると、図７Ｂに示すように圧縮された余肉１９が外周方向へ逃げようとするため、クランプ２１とフランジ部材２の間に隙間Ｓが生じる。フランジ部材２に形成した背面側拡孔部１７及びクランプ２１に形成した拡孔部３８がそれを助長する。そして、さらにパンチ３９が前進すると、フランジ部材２がパンチ３９の基部４５に押されて隙間Ｓが消失し、パンチ３９とクランプ２１の間にフランジ部材２が密着する。すると、余肉１９は、背面側拡孔部１７及び拡孔部３８に対応した三角形状の突起に形成される。 With such a configuration, the punch 39 is driven toward the pipe 3 as shown in FIGS. 6B and 6C. At this time, since the diameter of the medium diameter portion 43 of the punch 39 is larger than the diameter-expanded portion 47 on the distal end side of the pipe 3, the inner peripheral surface of the pipe 3 is expanded as shown in FIG. 7A. Then, as the pipe 3 is indicated by an arrow, a compressive force is applied in the axial direction of the pipe 3.
When the punch 39 further advances, as shown in FIG. 7B, the compressed surplus wall 19 tends to escape in the outer circumferential direction, so that a gap S is generated between the clamp 21 and the flange member 2. The back side expanded portion 17 formed in the flange member 2 and the expanded portion 38 formed in the clamp 21 promote it. When the punch 39 further advances, the flange member 2 is pushed by the base portion 45 of the punch 39 and the gap S disappears, and the flange member 2 comes into close contact between the punch 39 and the clamp 21. Then, the excess wall 19 is formed in a triangular projection corresponding to the back side enlarged portion 17 and the enlarged portion 38.

他方、パイプ３の開口側は、パンチ３９のフレア成形部４４により、パイプ３の開口部が外側に拡径され、パイプ３の拡径部がフランジ部材２の接続側拡孔部１６に拡がり、パイプ３にフレア１８が形成される。このように、フランジ部材２は貫通孔５の両端部で、フレア１８と余肉１９により挟着されるようにして、パイプ３にフランジ部材２が取付けられる。   On the other hand, the opening side of the pipe 3 is expanded to the outside by the flare molding portion 44 of the punch 39, and the expanded diameter portion of the pipe 3 is expanded to the connection side expanded portion 16 of the flange member 2, A flare 18 is formed in the pipe 3. As described above, the flange member 2 is attached to the pipe 3 so that the flange member 2 is sandwiched between the flare 18 and the extra wall 19 at both ends of the through hole 5.

以上、本発明の実施形態について説明したが、本発明は勿論、本発明の技術的思想に基づいて種々の変形、変更が可能であることを付言する。 As mentioned above, although embodiment of this invention was described, it adds that various deformation | transformation and a change are possible based on the technical idea of this invention as well as this invention.

本発明の活用例として、空調設備の配管の継ぎ手や、その他流体設備の配管の継ぎ手に幅広く利用可能性がある。 As an application example of the present invention, it can be widely used for a pipe joint of an air conditioning equipment and a pipe joint of other fluid equipment.

本発明実施形態に係るフランジ継ぎ手を示す断面図である。It is sectional drawing which shows the flange joint which concerns on this invention embodiment. 図２Ａはフランジ部材の平面図、図２Ｂは図２ＡにおけるＸ−Ｘ断面図である。2A is a plan view of the flange member, and FIG. 2B is a sectional view taken along line XX in FIG. 2A. 本発明実施形態に係る継ぎ手部を構成するフランジ部材と、継ぎ手部の成形に用いるアウタダイスおよびパンチの断面図である。It is sectional drawing of the outer die and punch used for the flange member which comprises the joint part which concerns on this invention embodiment, and shaping | molding of a joint part . 本発明の実施の形態における継ぎ手部の成形工程の第１成形工程を示す断面図であり、図４Ａは、クランプにパイプをセットし、アウタダイスにフランジ部材をセットした状態、図４Ｂは、フランジ部材をクランプにセットした状態、図４Ｃは、パイプをパンチ成形して第１成形工程が終了した状態を示す。Is a cross-sectional view illustrating a first forming step of forming step of the joint portion in the embodiment of the present invention, FIG. 4A sets the pipe clamp and set the flange member to Autadaisu state, FIG. 4B, the flange member FIG. 4C shows a state in which the first forming step is completed by punching the pipe. 図４のＢの円Ｗの拡大断面図である。It is an expanded sectional view of the circle W of B of FIG. 本発明の実施の形態における継ぎ手部の成形工程の第２成形工程を示す断面図であり、図６Ａは、パンチ成形前の状態、図６Ｂは、パイプにパンチを打付けている状態、図６Ｃは、パイプをパンチ成形して第２成形工程が終了した状態を示す。Is a cross-sectional view illustrating a second forming step of the joint portion of the forming step in the embodiment of the present invention, FIG. 6A, punch molding previous state, FIG 6B shows a state that nailed punch pipe, 6C These show the state which punch-formed the pipe and the 2nd shaping | molding process was complete | finished. 図６ＢからＣまでの成形時に、パイプに余肉ができる過程を示し、図７Ａは成形初期におけるパイプ内周面の応力を示す断面図であり、図７Ｂは余肉がクランプとフランジ部材間に入り込む状態を示す断面図であり、図７Ｃはフランジ部材の背面に余肉が形成された状態を示す断面図である。6B to C show the process of forming a surplus in the pipe, FIG. 7A is a cross-sectional view showing the stress on the inner peripheral surface of the pipe in the initial stage of molding, and FIG. 7B shows the surplus between the clamp and the flange member. FIG. 7C is a cross-sectional view showing a state in which an extra wall is formed on the back surface of the flange member. 従来のフランジ継ぎ手を示す断面図である。It is a sectional view showing a conventional flange joint. 図９Ａは従来のフランジ部材の平面図、図９Ｂは図９ＡにおけるＶ−Ｖ断面図である。9A is a plan view of a conventional flange member, and FIG. 9B is a VV cross-sectional view in FIG. 9A. 従来の雌側フランジ継ぎ手の断面図と従来及び本実施の形態に用いられる雄側フランジ継ぎ手の部分破断断面図である。It is sectional drawing of the conventional female side flange joint, and a fragmentary sectional view of the male side flange joint used for the prior art and this embodiment.

１ フランジ継ぎ手
２ フランジ部材
３ パイプ
４ 接続面
５ 貫通孔
７ 背面
１６ 接続側拡径部
１７ 背面側拡径部
１８ フレア
１９ 余肉
２１ クランプ
２２ 拘持部
２５ アウタダイス
２８ パンチ DESCRIPTION OF SYMBOLS 1 Flange joint 2 Flange member 3 Pipe 4 Connection surface 5 Through- hole 7 Back surface 16 Connection side enlarged diameter part 17 Back side enlarged diameter part 18 Flare 19 Extra thickness 21 Clamp 22 Grasping part 25 Outer die 28 Punch

Claims (5)

貫通孔を有し、該貫通孔にパイプ端部を背面側から接続側に挿通させた状態で該パイプ端部に固着されたフランジ部材を備え、被接続管部に接続した前記パイプ端部を、前記フランジ部材を介して前記被接続管部側に連結可能である継ぎ手部構造において、
前記フランジ部材は、前記貫通孔の接続側に拡孔部が形成されており、該貫通孔に、前記パイプ端部を挿通した状態で、該パイプ端部が軸方向のパンチ加工で拡径されることにより、前記パイプ端部の外周面が前記貫通孔の内面に圧接され、かつ、前記パイプの先端部が、前記フランジ部材の接続側拡孔部内に拡開されて拡開部が形成されるとともに、前記フランジ部材の背面側で前記パイプの余肉が前記パイプの外周面から突出して突出部が形成され、これらの拡開部と突出部とで前記フランジ部材が挟着されていることを特徴とする継ぎ手部構造。 Has a through hole, a flange member secured to the pipe end in a state of being inserted into the connecting side pipe end into the through hole from the back side, the pipe end connected to the connecting tube portion In the joint part structure that can be connected to the connected pipe part side through the flange member ,
It said flange member is reamed portion formed on the connection side of the through hole, the through hole, while inserting the pipe end, the pipe end portion is expanded by punching in the axial direction the Rukoto, the outer peripheral surface of the pipe end is pressed against the inner surface of the through hole, and the tip portion of the pipe, is expanded by the expanding portion is formed in the connecting side reaming portion of said flange member Rutotomoni, the flange protrusion excess thickness of the pipe at the rear side projecting from the outer peripheral surface of the pipe member is formed, the flange member and the protruding portion of these expansion opening portion is pinched joint structure, characterized in that. 前記フランジ部材は、前記貫通孔の背面側に拡孔部が形成されており、前記パイプの余肉が前記背面側拡孔部内に突出して前記突出部が形成されていることを特徴とする請求項１に記載の継ぎ手部構造。 Said flange member is reaming portion is formed on the back side of the through hole, characterized in that the excess thickness of the pipe said projection projects into the rear side reaming inside portion is formed The joint part structure according to claim 1. パイプ端部に固着されたフランジ部材を含む継ぎ手部であって、前記フランジ部材が、その貫通孔に前記パイプ端部を背面側から接続側に挿通させた状態で固着されるような継ぎ手部の成形方法において、
前記フランジ部材の貫通孔の接続側および背面側に予め拡孔部を形成しておき、
前記パイプ端部をクランプから突出させた状態で、前記クランプにより前記パイプを拘持し、前記クランプから突出した前記パイプ端部を、前記フランジ部材の貫通孔に挿通した状態で、前記パイプ端部に軸方向にパンチを圧入し、該パンチにより前記パイプ端部を拡径しかつその内面を成形することにより、前記パイプ端部の外周面を前記貫通孔の内面に圧接させ、かつ、前記パイプの先端部を、前記フランジ部材の接続側拡孔部内に拡開させて拡開部を形成するとともに、前記フランジ部材の背面側で前記パイプの余肉を前記パイプの外周面から前記背面側拡孔部内に突出させて突出部を形成し、これらの拡開部と突出部とで前記フランジ部材が挟着されるようにして、前記パイプ端部に前記フランジ部材を固着することを特徴とする継ぎ手部の成形方法。 A joint unit comprising a flange member fixed to the pipe end, wherein the flange member, the joint portion as fixed in the state in which the pipe end into the through holes are inserted into the connecting side from the back side In the molding method ,
Previously formed reaming portion to the connection side and the back side of the through hole of the flange member,
With the pipe end protruding from the clamp, the pipe is held by the clamp, and the pipe end protruding from the clamp is inserted into the through hole of the flange member, and the pipe end press-fitting the punch axially, by molding the inner surface of the enlarged diameter Shikatsuso the pipe end by the punch, it is pressed against the outer circumferential surface of the pipe end on the inner surface of the through hole, and wherein the tip of the pipe, the conjunction is widened to form a expansion opening portion to the flange member of the connection side reaming Internal, the rear side excess thickness of the pipe from the outer peripheral surface of the pipe at the rear side of the flange member forming a protruding portion to protrude into the reaming portion, wherein the flange member and the protruding portion of these expansion opening portion so as to be pinched, securing said flange member to said pipe end Continuation Molding method of the hand portion. 前記クランプとして、前記フランジ部材の背面側に隣接した拘持部の周囲に拡孔部を有するクランプを用い、前記フランジ部材の背面側拡孔部と前記クランプの拡孔部とを合わせた空隙部に、前記パイプの余肉を突出させることを特徴とする請求項３に記載の継ぎ手部の成形方法。 As the clamp, a gap having a widened portion around a gripping portion adjacent to the back side of the flange member is used , and a gap is formed by combining the back side widened portion of the flange member and the widened portion of the clamp. 4. The method for forming a joint portion according to claim 3 , wherein the surplus wall of the pipe is protruded. 前記フランジ部材の背面側に前記拡孔部を形成せず、前記クランプとして、前記フランジ部材の背面側に隣接した拘持部の周囲に拡孔部を有するクランプを用い、該クランプの拡孔部に前記パイプの余肉を突出させることを特徴とする請求項３に記載の継ぎ手部の成形方法。 Wherein without forming the reaming portion on the back side of the flange member, as the clamp, using a clamp having a reaming portion around the catching portion adjacent to the rear side of the flange member, reaming portion of the clamp 4. The method for forming a joint portion according to claim 3 , wherein an excess of the pipe is projected.
JP2003291177A 2003-08-11 2003-08-11 Joint structure and molding method thereof Expired - Fee Related JP4286613B2 (en)

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CN102463302A (en) * 2010-11-03 2012-05-23 郭国奇 Water pipe interface molding device for automobile air-conditioner heater
JP2015190386A (en) * 2014-03-28 2015-11-02 アイシン高丘株式会社 Intake/exhaust system piping for engine and method of manufacturing the same
CN104482339A (en) * 2014-12-16 2015-04-01 博耐尔汽车电气***有限公司 Air conditioner pipeline butt flange structure and installation method thereof
US10378686B2 (en) * 2016-07-08 2019-08-13 Hanon Systems Plastic seal fitting
CN113084019A (en) * 2020-01-09 2021-07-09 重庆华超金属有限公司 Expansion joint process and expansion joint structure

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