JPH08247357A - Flange joint and forming method thereof - Google Patents
Flange joint and forming method thereofInfo
- Publication number
- JPH08247357A JPH08247357A JP7080714A JP8071495A JPH08247357A JP H08247357 A JPH08247357 A JP H08247357A JP 7080714 A JP7080714 A JP 7080714A JP 8071495 A JP8071495 A JP 8071495A JP H08247357 A JPH08247357 A JP H08247357A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- mounting hole
- flange joint
- flange
- opening
- 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.)
- Pending
Links
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば車両用空調装
置においてパイプと、ヒータコアの出入口部等の連結部
材とを接続するために用いられるフランジ継手及びその
成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange joint used for connecting a pipe to a connecting member such as an inlet / outlet portion of a heater core in a vehicle air conditioner, and a method for forming the same.
【０００２】[0002]
【従来の技術】従来のフランジ継手の構成としては、実
公平５−４０３９３号公報の第１図に示されているもの
が公知となっている。かかるフランジ継手を概説する
と、配管Ｐのフランジ体１両側において、該フランジ体
１の組付け孔２よりも径の大きな環状突出壁部Ｐ1 と拡
管壁部Ｐ2 とが当接している。これにより、環状突出壁
部Ｐ1 と拡管壁部Ｐ2 とでフランジ体１が挟持固定され
て、フランジ継手が構成されるようになっている。2. Description of the Related Art As a structure of a conventional flange joint, that shown in FIG. 1 of Japanese Utility Model Publication No. 5-40393 is well known. To outline such a flange joint, on both sides of the flange body 1 of the pipe P, an annular projecting wall portion P 1 having a diameter larger than that of the assembly hole 2 of the flange body 1 and the pipe expanding wall portion P 2 are in contact with each other. As a result, the flange body 1 is sandwiched and fixed by the annular projecting wall portion P 1 and the pipe expanding wall portion P 2 to form a flange joint.
【０００３】このフランジ継手は、図８乃至図１３に示
される様な下記する工程で成形されると推測される。か
かる成形工程を説明すると、第１の工程では、図８に示
される様に、先端部がフランジ部材（フランジ体）２０
の被連結部材との当接面２２側から突出するようにパイ
プ１を被連結部材との反当接面２１側からフランジ部材
２０の取付孔２５に挿入する。第２の工程では、図９に
示される様に、第１回目のプレスによりフランジ部材２
０の前記反当接面２１より手前側のパイプ１側面に拡張
部（環状突出壁部）２を成形する。第３の工程では、図
１０に示される様に、第２回目のプレスによりパイプ１
の前記先端部を拡管する。第４の工程では、図１１に示
される様に、第３回目のプレスによりパイプ１の先端部
のうち前記拡管された側の開口近傍を縮管し、この縮管
部分よりもフランジ部材２０側を拡管したままとして、
拡張部（拡管壁部）３を予備成形する。第５の工程で
は、図１２に示される様に、第４回目のプレスにより拡
張部３を最終成形する。第６の工程では、図１３に示さ
れる様に、第５回目のプレスにより前記縮管部分の開口
近傍を再度拡管することにより開口部５を成形してＯー
リング外挿部４を形成する。It is assumed that this flange joint is formed by the following steps as shown in FIGS. 8 to 13. Explaining such a forming step, in the first step, as shown in FIG. 8, the tip end portion is a flange member (flange body) 20.
The pipe 1 is inserted into the mounting hole 25 of the flange member 20 from the side of the contact surface 21 opposite to the connected member so as to project from the side of the contact surface 22 with the connected member. In the second step, as shown in FIG. 9, the flange member 2 is pressed by the first press.
The expansion portion (annular protruding wall portion) 2 is formed on the side surface of the pipe 1 on the front side of the counter contact surface 21 of 0. In the third step, as shown in FIG. 10, the pipe 1 is pressed by the second press.
Expand the tip of the tube. In the fourth step, as shown in FIG. 11, the vicinity of the opening on the expanded side of the tip end portion of the pipe 1 is contracted by the third pressing, and the flange member 20 side is closer to this contracted pipe portion. With the tube expanded,
The expansion portion (expansion wall portion) 3 is preformed. In the fifth step, as shown in FIG. 12, the expanded portion 3 is finally formed by the fourth pressing. In the sixth step, as shown in FIG. 13, the opening 5 is formed by re-expanding the vicinity of the opening of the contracted tube portion by the fifth press to form the O-ring extrapolation portion 4.
【０００４】[0004]
【発明が解決しようとする課題】この様に、上記公知の
フランジ継手は、Ｏーリング外挿部を形成する工程まで
含める場合には、最低でも６回の成形工程を要すると共
にその成形にあたっては少なくとも５回のプレスを行
う。このため、プレスごとに異なった型を備えたクラン
プを使用するので、フランジ継手の成形には多数のクラ
ンプが必要となる。しかも、多数のクランプを必要とす
るので成形機が大型となる。よって、上記公知のフラン
ジ継手を成形するには、多大な設備費用を要するという
不都合を有していた。As described above, the above-mentioned known flange joint requires at least 6 molding steps when the step of forming the O-ring extrapolation portion is included, and at least the molding step is required. Press 5 times. For this reason, since clamps having different molds are used for each press, a large number of clamps are required for forming the flange joint. Moreover, since a large number of clamps are required, the molding machine becomes large. Therefore, there is an inconvenience that a large equipment cost is required to form the above-mentioned known flange joint.
【０００５】一方で、図１４に示される様に、パイプ１
とフランジ部材２０との回転防止をより良く行うため
に、フランジ部材２０を挟持する２つの拡張部２及び拡
張部３がフランジ部材２０の段部５０，５１に挿嵌され
るフランジ継手も考えられている。しかし、かかるフラ
ンジ継手の構成では、フランジ部材２０を多数の工程で
加工しなければならないので、フランジ継手の成形コス
トが高くなるという不都合があった。On the other hand, as shown in FIG. 14, the pipe 1
In order to prevent rotation between the flange member 20 and the flange member 20 better, a flange joint in which two expansion portions 2 and 3 that sandwich the flange member 20 are inserted into the step portions 50 and 51 of the flange member 20 is also considered. ing. However, in such a structure of the flange joint, the flange member 20 has to be processed in a large number of steps, so that there is a disadvantage that the molding cost of the flange joint increases.
【０００６】また、図１５に示される様に、少なくとも
パイプ１の一方側には拡張部を成形しないフランジ継手
も考えられている。このフランジ継ぎ手は、取付孔２５
の内径が段部５１以外の部分において均等な寸法をなし
ていると共に、その均等な径を有する部分もパイプ１よ
りも径が大きなものとしている。よって、この取付孔２
５にパイプ１を挿入した後かかる挿入した部分をプレス
で膨出することによりパイプ１を取付孔２５に密接でき
る。しかし、かかるフランジ継手の構成では、パイプ１
の膨出範囲を確定できないので、取付孔２５の開口部近
傍においてパイプ１とフランジ部材２０との間に隙間が
生じ、この隙間に水が浸入して、フランジ継手が腐食又
は劣化するという不具合を有していた。Also, as shown in FIG. 15, a flange joint in which an expansion portion is not formed on at least one side of the pipe 1 is also considered. This flange joint has a mounting hole 25
The inner diameter of the pipe is uniform in the portion other than the step portion 51, and the portion having the uniform diameter is also larger in diameter than the pipe 1. Therefore, this mounting hole 2
After inserting the pipe 1 into the pipe 5, the pipe 1 can be brought into close contact with the mounting hole 25 by expanding the inserted portion with a press. However, in such a flange joint configuration, the pipe 1
Since the bulging range cannot be determined, a gap is created between the pipe 1 and the flange member 20 in the vicinity of the opening of the mounting hole 25, and water penetrates into this gap, which causes corrosion or deterioration of the flange joint. Had.
【０００７】そこで、この発明においては、上記問題点
に鑑み、プレスの回数を減少して成形工数を減少し、フ
ランジ部材とパイプとの回転をフランジ部材に段部をあ
えて形成することなく良好に防止でき、且つ取付孔の開
口部近傍においてパイプとフランジ部材との間に隙間が
生ずることを防止できるフランジ継手及びその成形方法
を提供することを目的とする。In view of the above problems, therefore, in the present invention, the number of presses is reduced to reduce the number of forming steps, and the rotation of the flange member and the pipe is favorably performed without forming a step on the flange member. It is an object of the present invention to provide a flange joint that can be prevented and can prevent a gap from occurring between a pipe and a flange member in the vicinity of an opening of a mounting hole, and a method for forming the flange joint.
【０００８】[0008]
【課題を解決するための手段】しかして、フランジ継手
は、パイプの端部にフランジ部材を取り付けて成るもの
であって、前記フランジ部材には被連結部材との反当接
面側から当接面側に向けて徐々に絞った取付孔が形成さ
れ、この取付孔に前記当接面側から先端部が突出するよ
う前記パイプが挿入され、前記取付孔の内面に前記パイ
プの側面を膨出させて密接させると共に、前記取付孔の
当接面側の開口周縁部に前記パイプの拡張部を当接させ
た構成をなしている（請求項１）。SUMMARY OF THE INVENTION A flange joint is formed by attaching a flange member to an end portion of a pipe, and the flange member is in contact with a member to be connected from an opposite contact surface side. A mounting hole that is gradually narrowed toward the surface side is formed, the pipe is inserted into the mounting hole so that the tip portion projects from the contact surface side, and the side surface of the pipe bulges on the inner surface of the mounting hole. The pipes are brought into close contact with each other, and the expanded portion of the pipe is brought into contact with the peripheral edge of the opening on the contact surface side of the mounting hole (claim 1).
【０００９】そして、このフランジ継手を成形するにあ
たっては、被連結部材との反当接面側から当接面側に向
かって徐々に絞られてなるフランジ部材の取付孔にパイ
プを挿入する第１の工程と、前記パイプの軸方向からの
第１回目のプレスにより該パイプの前記取付孔に挿入さ
れた部分を膨出させて前記取付孔の内面に密接させると
共に、前記取付孔の当接面側から突出した部分を膨出さ
せて拡張部を予備成形する第２の工程と、前記パイプの
軸方向からの第２回目のプレスにより前記拡張部を最終
成形して前記取付孔の当接面側の開口周縁部に当接する
第３の工程とが用いられる（請求項３）。In forming the flange joint, the pipe is inserted into the mounting hole of the flange member which is gradually narrowed from the side opposite to the contact surface with the member to be connected toward the contact surface side. And the first press from the axial direction of the pipe, the portion of the pipe inserted into the mounting hole is bulged and brought into close contact with the inner surface of the mounting hole, and the contact surface of the mounting hole is A second step of bulging the portion protruding from the side to preform the expanded portion, and a second press in the axial direction of the pipe to finally form the expanded portion to abut the contact surface of the mounting hole. And a third step of contacting the peripheral edge of the opening on the side (claim 3).
【００１０】ここで、フランジ継手のパイプの先端部に
は、拡管してなる開口部を形成することにより、前記拡
張部と前記開口部との間にＯ−リングを外挿する部分を
形成しても良い（請求項２）。Here, by forming an expanded opening at the tip of the pipe of the flange joint, a portion for externally inserting an O-ring is formed between the expanded portion and the opening. It may be (claim 2).
【００１１】この場合には、前記第３工程の後、第３回
目のプレスにより前記パイプの先端部を拡管して開口部
を形成し、前記拡張部と開口部との間にＯ−リングを外
挿する部分を成形する第４工程が加えられることとなる
（請求項４）。In this case, after the third step, the tip of the pipe is expanded by a third press to form an opening, and an O-ring is provided between the expansion and the opening. A fourth step of molding the portion to be extrapolated will be added (claim 4).
【００１２】[0012]
【作用】従って、この発明によれば、Ｏーリングを外挿
する部分を形成する工程まで含めても、プレスを取付孔
に挿入された部分の膨出及び拡張部の予備成形、拡張部
の最終成形、及びパイプの開口部の成形の３回のプレス
作業で済むので、プレス回数を減少させることができる
と共に、これに伴いフランジ継手の成形工数も減少させ
ることができる。Therefore, according to the present invention, even when the step of forming the portion for externally inserting the O-ring is included, swelling of the portion where the press is inserted into the mounting hole, preforming of the expanded portion, and final formation of the expanded portion. Since three pressing operations of forming and forming the opening of the pipe are sufficient, the number of times of pressing can be reduced, and the man-hours for forming the flange joint can be reduced accordingly.
【００１３】また、フランジ部材の連結部材との反当接
面側におけるフランジ部材とパイプとの回転防止は、パ
イプの取付孔に挿入させた部分をパイプの軸方向からの
プレスにより膨出して密接させることにより行うので、
フランジ部材とパイプ側面との間の摩擦係数を大きくで
き、パイプの回転を防止することができる。このため、
フランジ部材には、パイプの回転を防止するための段部
を取付孔の開口周縁部にあえて形成する必要がない。Further, the rotation of the flange member and the pipe on the side opposite to the contact surface of the flange member with the connecting member is prevented by the portion inserted into the mounting hole of the pipe being bulged by a press in the axial direction of the pipe and closely contacting each other. Because it is done by
The coefficient of friction between the flange member and the side surface of the pipe can be increased, and the rotation of the pipe can be prevented. For this reason,
In the flange member, it is not necessary to form a step portion for preventing the rotation of the pipe at the peripheral edge portion of the opening of the mounting hole.
【００１４】更に、パイプの取付孔に挿入させた部分
は、パイプの軸方向からプレスして膨出することにより
取付孔の内周面に密接するので、パイプとフランジ部材
との間に隙間が生ずるのを防止できる。Further, since the portion inserted into the mounting hole of the pipe comes into close contact with the inner peripheral surface of the mounting hole by pressing and expanding from the axial direction of the pipe, there is a gap between the pipe and the flange member. It can be prevented from occurring.
【００１５】[0015]
【実施例】以下、この発明の実施例を図面により説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１において、この発明に係るフランジ継
手によりパイプ１が被連結部材３０の挿入孔３１に挿嵌
して取付けられた状態が示されている。かかるフランジ
継手は、フランジ部材２０にパイプ１を取付けてなるも
のである。FIG. 1 shows a state in which the pipe 1 is inserted and fitted into the insertion hole 31 of the member to be connected 30 by the flange joint according to the present invention. Such a flange joint is one in which the pipe 1 is attached to the flange member 20.
【００１７】このうちフランジ部材２０は被連結部材３
０の反当接面２１から被連結部材３０に当接する当接面
２２まで貫通した取付孔２５が形成されている。この取
付孔２５は、下記するパイプ１が挿嵌されるもので、反
当接面２１側の開口部から当接面２２側の開口部までに
わたって徐々に絞められたものとなっている。このため
取付孔２５の当接面２２側の開口部の径は反当接面２１
側の開口部の径よりも小さくなっている。Of these, the flange member 20 is the member to be connected 3
A mounting hole 25 is formed that penetrates from the non-abutting surface 21 of 0 to the abutting surface 22 that abuts on the connected member 30. The pipe 1 described below is inserted into the mounting hole 25, and is gradually narrowed from the opening portion on the side opposite to the contact surface 21 to the opening portion on the side of the contact surface 22. For this reason, the diameter of the opening of the mounting hole 25 on the contact surface 22 side is the same as that of the non-contact surface 21
It is smaller than the diameter of the opening on the side.
【００１８】パイプ１は、例えばアルミニウムを主材料
とするもので、フランジ部材２０から突出した部分は略
均等な径をなしているが、取付孔２５に挿入された部分
は膨出形成されてフランジ部材２０の内面に密接する径
をなしている。即ち、パイプ１は、フランジ部材２０の
反当接面２１側の開口部位でその径が最も大きくなるよ
うに、取付孔２５の被連結部材との当接面２２側から徐
々に径が拡がっている。また、パイプ１は、当接面２１
側において拡張部３が形成されており、この拡張部３は
取付孔２５の開口周縁部に当接したものとなっている。
これにより、パイプ１はフランジ部材２０に強固に取付
けられた状態となっている。更に、パイプ１は、先端部
の開口近傍において、拡張部３と略同じ径に拡管された
開口部５が形成されており、この拡張部３と開口部５と
の間にＯーリング外挿部４が形成されている。The pipe 1 is made of, for example, aluminum as a main material, and the portion protruding from the flange member 20 has a substantially uniform diameter, but the portion inserted into the mounting hole 25 is bulged to form a flange. The diameter is close to the inner surface of the member 20. That is, the diameter of the pipe 1 gradually increases from the contact surface 22 side of the attachment hole 25 with the connected member so that the diameter of the pipe 1 becomes the largest at the opening portion on the side of the flange member 20 opposite to the contact surface 21. There is. Further, the pipe 1 has the contact surface 21.
The expanded portion 3 is formed on the side, and the expanded portion 3 is in contact with the opening peripheral portion of the mounting hole 25.
As a result, the pipe 1 is firmly attached to the flange member 20. Further, the pipe 1 has an opening 5 formed to have a diameter substantially the same as that of the expansion 3 near the opening at the tip end, and an O-ring external insertion portion is provided between the expansion 3 and the opening 5. 4 are formed.
【００１９】被連結部材３０には、前記パイプ１の拡張
部３及び拡管部５の外径と略同径の挿入孔３１が形成さ
れている。The connected member 30 is provided with an insertion hole 31 having a diameter substantially the same as the outer diameter of the expansion portion 3 and the expansion portion 5 of the pipe 1.
【００２０】これにより、Ｏーリング外挿部４にＯーリ
ング１０を外挿して、フランジ部材２０の当接面２２が
被連結部材３０に当接するまでフランジ継手のパイプ１
を挿入孔３１に挿着した場合には、このＯーリング１０
により被連結部材３０とフランジ継手とがシール良く連
結される。As a result, the O-ring 10 is externally inserted into the O-ring external insertion portion 4, and the pipe 1 of the flange joint is fitted until the contact surface 22 of the flange member 20 contacts the connected member 30.
When the O-ring 10 is inserted into the insertion hole 31,
As a result, the connected member 30 and the flange joint are connected with a good seal.
【００２１】次に、このフランジ継手の成形方法につい
て図２乃至図５を用いて説明する。Next, a method of forming this flange joint will be described with reference to FIGS.
【００２２】まず、第１の工程として、図２に示される
様に、被連結部材との反当接面２１側から当接面２２側
まで徐々に絞られてなる取付孔２５に、径の寸法が均等
なパイプ１を例えば当接面２２側から挿入する。これに
より、パイプ１と取付孔２５の内周面との間には、若干
の隙間Ａが形成される。First, as a first step, as shown in FIG. 2, a diameter of the mounting hole 25 is gradually reduced from the side of the contact surface 21 opposite to the connecting member to the side of the contact surface 22. The pipe 1 having uniform dimensions is inserted, for example, from the contact surface 22 side. As a result, a slight gap A is formed between the pipe 1 and the inner peripheral surface of the mounting hole 25.
【００２３】次に、第２の工程として、図３に示される
様に、所定の型が形成されたクランプ（図示せず）によ
り、パイプ１に対しその軸方向（矢印方向）でフランジ
部材２０を挟むように第１回目のプレスをする。かかる
プレスの際、パイプ１が内側へ変形しない様にマンドレ
ル１５を先端開口部からパイプ１に奥深く挿入しておく
必要がある。これにより、パイプ１は、前記隙間Ａを塞
ぐように径方向に拡管されて取付孔２５の内周面に密接
する。そして、これと同時に当接面２２側において拡張
部３が仮成形される。Next, as a second step, as shown in FIG. 3, the flange member 20 is axially (arrow direction) attached to the pipe 1 by a clamp (not shown) having a predetermined mold formed thereon. The first press is performed so as to sandwich. At the time of such pressing, it is necessary to insert the mandrel 15 deeply into the pipe 1 through the tip opening so that the pipe 1 is not deformed inward. As a result, the pipe 1 is expanded in the radial direction so as to close the gap A and comes into close contact with the inner peripheral surface of the mounting hole 25. At the same time, the expanded portion 3 is temporarily formed on the contact surface 22 side.
【００２４】そして、第３の工程として、図４に示され
る様に、図示しない前記とは異なる型が形成されたクラ
ンプにより、パイプ１に対しその軸方向（矢印方向）に
第２回目のプレスをする。これにより、拡張部３が最終
形成されると共にフランジ部材２０の当接面２２側の開
口周縁部に当接する。As a third step, as shown in FIG. 4, a second press is performed on the pipe 1 in the axial direction (arrow direction) by a clamp (not shown) formed with a mold different from the above. do. As a result, the expanded portion 3 is finally formed and contacts the peripheral edge portion of the opening of the flange member 20 on the contact surface 22 side.
【００２５】更に、第４の工程として、図５に示される
様に、これも図示しない前記とは異なる型が形成された
クランプにより、パイプ１に対しその軸方向（矢印方
向）で第３回目のプレスをし、開口部５を形成する。こ
の際、かかる開口部５は、拡張部３から所定の幅を隔て
て拡管されて成り、これにより拡張部３と開口部５との
間にＯーリング外挿部４が形成されるようにする。Further, as a fourth step, as shown in FIG. 5, a third mold is formed on the pipe 1 in the axial direction (arrow direction) by a clamp (not shown) having a mold different from that described above. Then, the opening 5 is formed. At this time, the opening 5 is expanded from the expansion portion 3 with a predetermined width, so that the O-ring extrapolation portion 4 is formed between the expansion portion 3 and the opening 5. .
【００２６】従って、以上の工程でフランジ継手を成形
するため、その成形工程も４回に削減することができる
と共に、プレス作業が３回で済むので成形機の小型化が
図れ、設備費用を低減できる。Therefore, since the flange joint is formed by the above steps, the forming step can be reduced to four times, and the press work can be performed only three times, so that the forming machine can be downsized and the equipment cost can be reduced. it can.
【００２７】また、本願発明に係るフランジ継手は、パ
イプの取付孔に挿入させた部分をパイプの軸方向からの
プレスで膨出して密接させることによりパイプ１の回転
止めを実現できるため、あえて取付孔２５の開口周縁部
に段部を形成する必要がない。従って、段部を形成しな
いことによりフランジ継手の成形費用の低減が図れるの
で、これまでフランジ部材２０の当接面２２，反当接面
２１に何らの加工をしないものとして説明してきた。し
かしながら、必ずしもこれに限定されるものではない。Further, in the flange joint according to the present invention, the rotation of the pipe 1 can be stopped by bulging the portion inserted into the mounting hole of the pipe by a press in the axial direction of the pipe and bringing them into close contact with each other. It is not necessary to form a step on the peripheral edge of the opening of the hole 25. Therefore, since the molding cost of the flange joint can be reduced by not forming the step portion, it has been described that the contact surface 22 and the non-contact surface 21 of the flange member 20 are not processed at all. However, it is not necessarily limited to this.
【００２８】即ち、図６に示される様に、当接側面２２
側の開口周縁部を切欠いて段部５１を形成し、この段部
５１にパイプ１の拡張部３が挿嵌圧接されることにより
パイプ１とフランジ部材２０との回転防止を図っても良
い。この場合、Ｏーリング挿入部４は、フランジ部材２
０の当接面２２よりもパイプ１の先端側に形成し、パイ
プ継手と被連結部材３０とをシール性良く連結させるこ
とが望まれる。That is, as shown in FIG. 6, the contact side surface 22
It is possible to prevent the rotation of the pipe 1 and the flange member 20 by forming a step portion 51 by notching the peripheral edge portion of the opening on the side, and inserting the expanded portion 3 of the pipe 1 into the step portion 51 by press fitting. In this case, the O-ring insertion portion 4 is the flange member 2
It is desired that the pipe joint and the member to be connected 30 are connected to each other with good sealing property by being formed closer to the tip end of the pipe 1 than the contact surface 22 of 0.
【００２９】また、図７（ａ），（ｂ）に示される様
に、フランジ部材２０の当接側面２２側において、取付
孔２５の開口部から放射線状に延びる細長い断面が逆三
角形状の突部５５を複数形成し、この突部５５に拡張部
３を押し当てるようにプレスしてフランジ継手を成形し
ても良い。これにより、パイプ１とフランジ部材２０と
の回転防止がより確実に行われる。Further, as shown in FIGS. 7 (a) and 7 (b), on the side of the abutting side surface 22 of the flange member 20, a protrusion having an elongated cross section extending radially from the opening of the mounting hole 25 has an inverted triangular shape. It is also possible to form a plurality of parts 55 and press the expansion part 3 against the protrusions 55 to form a flange joint. Thereby, the rotation prevention of the pipe 1 and the flange member 20 is performed more reliably.
【００３０】尚、これら図６及び図７に示されるフラン
ジ継手の変形例は、段部５１又は突部５５をフランジ部
材２０に形成した以外の構成について、前記実施例と同
じくするので、同一の箇所に同一の符号を付してその説
明を省略する。また、その成形方法も、前記実施例とは
第３の工程において拡張部３が連結部材との当接面に当
接する代わりに段部５１の内面に当接し、または拡張部
３が連結部材との当接面２２に当接すると同時に突部５
５にも当接するという違いだけなので、その説明を省略
する。The modifications of the flange joint shown in FIGS. 6 and 7 are the same as those of the above embodiment except for the step 51 or the protrusion 55 formed on the flange member 20. The same reference numerals are given to the parts and the description thereof will be omitted. Also, in the molding method, in the third step from the above-described embodiment, instead of contacting the expansion part 3 with the contact surface with the connecting member, the expansion part 3 contacts the inner surface of the stepped portion 51, or the expansion part 3 with the connecting member. Of the projection 5 at the same time when it abuts the abutment surface 22 of
Since the only difference is that it also abuts No. 5, its explanation is omitted.
【００３１】[0031]
【発明の効果】以上の様に、この発明によれば、プレス
回数の減縮に伴いフランジ継手の成形工数を削減するこ
とができると共に、クランプ数も削減して成形機の小型
化が図られ、フランジ継手の成形のための設備費用を低
減することができる。As described above, according to the present invention, it is possible to reduce the molding man-hours of the flange joint as the number of presses is reduced, and also to reduce the number of clamps to downsize the molding machine. The equipment cost for forming the flange joint can be reduced.
【００３２】また、パイプの取付孔に挿入させた部分を
フランジ部材の取付孔の内周面に密接させることによ
り、フランジ部材とパイプとの回転を防止できるので、
フランジ部材にはあえて段部を形成する必要がなく、フ
ランジ継手の成形コストを削減できる。Since the portion inserted into the mounting hole of the pipe is brought into close contact with the inner peripheral surface of the mounting hole of the flange member, the rotation of the flange member and the pipe can be prevented.
Since it is not necessary to form a step on the flange member, it is possible to reduce the molding cost of the flange joint.
【００３３】更に、パイプの取付孔に挿入させた部分
は、パイプの軸方向からのプレスにより膨出して取付孔
の内周面に密接させるため、パイプとフランジ部材との
間に隙間が生じないので、水が浸入してフランジ継手が
腐食したり劣化したりすることを防止できる。Further, since the portion inserted into the mounting hole of the pipe swells by the press in the axial direction of the pipe and comes into close contact with the inner peripheral surface of the mounting hole, no gap is created between the pipe and the flange member. Therefore, it is possible to prevent water from entering and the flange joint from being corroded or deteriorated.
【図１】図１は、この発明に係るフランジ継手を被連結
部材にＯーリングを用いて挿嵌した状態を示した説明図
である。FIG. 1 is an explanatory view showing a state in which a flange joint according to the present invention is fitted into a member to be connected by using an O-ring.
【図２】乃至FIG. 2
【図５】図１乃至図４は、上記フランジ継手の成形工程
を示した説明図である。5A to 5C are explanatory views showing a forming process of the flange joint.
【図６】図６は、上記フランジ継手のプレートに段部を
形成した変形例を示した説明図である。FIG. 6 is an explanatory view showing a modified example in which a step portion is formed on the plate of the flange joint.
【図７】図７（ａ）及び（ｂ）は、上記フランジ継手の
プレートに突部を形成した変形例を示した説明図であ
る。7 (a) and 7 (b) are explanatory views showing a modified example in which a protrusion of the plate of the flange joint is formed.
【図８】乃至FIG. 8
【図１３】図８乃至図１３は、従来のフランジ継手の成
形工程を示した説明図である。FIG. 8 to FIG. 13 are explanatory views showing a forming process of a conventional flange joint.
【図１４】図１４は、上記とは別の従来のフランジ継手
が被連結部材にＯーリングを用いて挿嵌された状態を示
した説明図である。FIG. 14 is an explanatory view showing a state in which a conventional flange joint different from the above is inserted and fitted into a member to be connected using an O-ring.
【図１５】図１５は、更に上記とは別の従来のフランジ
継手が被連結部材にＯーリングを用いて挿嵌された状態
を示した説明図である。FIG. 15 is an explanatory view showing a state in which a conventional flange joint different from the above is further inserted and fitted to the connected member by using an O-ring.
１ パイプ ３ 拡張部 ４ Ｏーリング外挿部 ５ 開口部 ２０ フランジ部材 ２１ 被連結部材との反当接面 ２２ 被連結部材との当接面 ２５ 取付孔 ３０ 被連結部材 DESCRIPTION OF SYMBOLS 1 Pipe 3 Expansion part 4 O-ring external insertion part 5 Opening 20 Flange member 21 Non-contact surface with a connected member 22 Contact surface with a connected member 25 Mounting hole 30 Connected member
Claims (4)
て成るフランジ継手において、前記フランジ部材には被
連結部材との反当接面側から当接面側に向けて徐々に絞
った取付孔が形成され、この取付孔に前記当接面側から
先端部が突出するよう前記パイプが挿入され、前記取付
孔の内面に前記パイプの側面を膨出させて密接させると
共に、前記取付孔の当接面側の開口周縁部に前記パイプ
の拡張部を当接させてなることを特徴とするフランジ継
手。1. A flange joint in which a flange member is attached to an end portion of a pipe, wherein the flange member has an attachment hole that is gradually narrowed from an opposite contact surface side to the connected member toward the contact surface side. The pipe is inserted into the mounting hole so that the tip portion projects from the contact surface side, and the side surface of the pipe is bulged and brought into close contact with the inner surface of the mounting hole, and the contact of the mounting hole is made. A flange joint characterized in that the expanded portion of the pipe is brought into contact with the peripheral edge of the opening on the surface side.
開口部が形成され、前記拡張部と前記開口部との間にＯ
−リングを外挿する部分が形成されていることを特徴と
する請求項１記載のフランジ継手。2. An opening formed by expanding the pipe is formed at a tip portion of the pipe, and O is provided between the expansion and the opening.
A flange joint according to claim 1, characterized in that a portion for inserting the ring is formed.
に向かって徐々に絞られてなるフランジ部材の取付孔に
パイプを挿入する第１の工程と、前記パイプの軸方向か
らの第１回目のプレスにより該パイプの前記取付孔に挿
入された部分を膨出させて前記取付孔の内面に密接させ
ると共に、前記取付孔の当接面側から突出した部分を膨
出させて拡張部を予備成形する第２の工程と、前記パイ
プの軸方向からの第２回目のプレスにより前記拡張部を
最終成形して前記取付孔の当接面側の開口周縁部に当接
する第３の工程とを具備することを特徴とするフランジ
継手の成形方法。3. A first step of inserting a pipe into a mounting hole of a flange member which is gradually narrowed from the side opposite to the contact surface to the member to be connected toward the contact surface side, and the axial direction of the pipe. By the first press from the above, the portion of the pipe inserted into the mounting hole is swollen to be in close contact with the inner surface of the mounting hole, and the portion protruding from the contact surface side of the mounting hole is swollen. And a second step of preforming the expansion part by a second press from the axial direction of the pipe, and finally forming the expansion part by abutting against the peripheral edge of the mounting hole on the contact surface side. 3. A method for forming a flange joint, which comprises the step 3).
より前記パイプの先端部を拡管して開口部を形成し、前
記拡張部と開口部との間にＯ−リングを外挿する部分を
成形する第４工程を加えたことを特徴とする請求項３記
載のフランジ継手の成形方法。4. After the third step, the tip of the pipe is expanded by a third press to form an opening, and an O-ring is externally inserted between the expansion and the opening. The method of forming a flange joint according to claim 3, wherein a fourth step of forming the portion is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7080714A JPH08247357A (en) | 1995-03-13 | 1995-03-13 | Flange joint and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7080714A JPH08247357A (en) | 1995-03-13 | 1995-03-13 | Flange joint and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08247357A true JPH08247357A (en) | 1996-09-27 |
Family
ID=13726021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7080714A Pending JPH08247357A (en) | 1995-03-13 | 1995-03-13 | Flange joint and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08247357A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021832A1 (en) * | 1994-02-14 | 1995-08-17 | Xenova Limited | Pharmaceutical piperazine compounds |
| WO1995021829A1 (en) * | 1994-02-14 | 1995-08-17 | Xenova Limited | Pharmaceutical piperazine compounds |
| US6328351B1 (en) | 1998-07-27 | 2001-12-11 | Denso Corporation | Pipe joint with enlarged metal pipe and method for manufacturing same |
| JP2003172491A (en) * | 2001-12-07 | 2003-06-20 | Rinnai Corp | Pipe with double bead |
| CN112008374A (en) * | 2020-07-21 | 2020-12-01 | 重庆工程职业技术学院 | Flange installation module and fire-fighting air duct production line thereof |
| CN116146784A (en) * | 2023-04-20 | 2023-05-23 | 宁波福士汽车部件有限公司 | Welding-free flange cold forming processing pipeline and processing technology thereof |
-
1995
- 1995-03-13 JP JP7080714A patent/JPH08247357A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021832A1 (en) * | 1994-02-14 | 1995-08-17 | Xenova Limited | Pharmaceutical piperazine compounds |
| WO1995021829A1 (en) * | 1994-02-14 | 1995-08-17 | Xenova Limited | Pharmaceutical piperazine compounds |
| US6328351B1 (en) | 1998-07-27 | 2001-12-11 | Denso Corporation | Pipe joint with enlarged metal pipe and method for manufacturing same |
| JP2003172491A (en) * | 2001-12-07 | 2003-06-20 | Rinnai Corp | Pipe with double bead |
| CN112008374A (en) * | 2020-07-21 | 2020-12-01 | 重庆工程职业技术学院 | Flange installation module and fire-fighting air duct production line thereof |
| CN116146784A (en) * | 2023-04-20 | 2023-05-23 | 宁波福士汽车部件有限公司 | Welding-free flange cold forming processing pipeline and processing technology thereof |
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