JP3267475B2 - Method of forming the insertion protrusion of cast iron pipe - Google Patents
Method of forming the insertion protrusion of cast iron pipeInfo
- Publication number
- JP3267475B2 JP3267475B2 JP23795195A JP23795195A JP3267475B2 JP 3267475 B2 JP3267475 B2 JP 3267475B2 JP 23795195 A JP23795195 A JP 23795195A JP 23795195 A JP23795195 A JP 23795195A JP 3267475 B2 JP3267475 B2 JP 3267475B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- stopper ring
- brazing material
- iron pipe
- heating
- 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
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Joints With Sleeves (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、鋳鉄管の接続部に
おける挿口の先端部外周側に接続部離脱防止用の環状の
挿口突部を形成する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a ring-shaped insertion projection for preventing the connection from coming off at the outer periphery of the front end of the insertion at the connection of a cast iron pipe.
【０００２】[0002]
【従来の技術】図３に示すように、一般的に鋳鉄管１の
接続部、とくに挿口２の外周面２ａには、鋼製またはダ
クタイル鋳鉄などの強靱鋳鉄製のストッパリング３’を
固着させることにより環状の挿口突部３を形成してい
る。鋳鉄管１の接続部における挿口相手側の受口４の内
周面には溝５が形成されてこの溝５に心出しゴム輪７を
介して周方向一つ割形状のロックリング６が嵌着されて
おり、このロックリング６と挿口突部３とが互いに係合
することにより、鋳鉄管１の接続部同士が離脱しないよ
うになっている。なお、図３における８は受口４の開口
端寄りの溝９と挿口２の外周面２ａとの間に配置された
ゴム輪である。2. Description of the Related Art As shown in FIG. 3, a stopper ring 3 'made of steel or ductile cast iron or the like is generally fixed to a connection portion of a cast iron tube 1, particularly an outer peripheral surface 2a of an insertion opening 2. By doing so, an annular insertion projection 3 is formed. A groove 5 is formed on the inner peripheral surface of the receiving port 4 on the mating side of the connection side of the cast iron tube 1, and a lock ring 6 having a circumferentially split shape is formed in the groove 5 via a centering rubber ring 7. The lock ring 6 and the insertion projection 3 are engaged with each other, so that the connection portions of the cast iron pipe 1 are not separated from each other. Reference numeral 8 in FIG. 3 denotes a rubber ring disposed between the groove 9 near the opening end of the receiving port 4 and the outer peripheral surface 2a of the insertion port 2.
【０００３】従来は、ストッパリング３’を以下のよう
にして鋳鉄管１の挿口２に一体的に固着させて挿口突部
３を形成していた。図４の（ａ）に示すように、挿口突
部３を形成するストッパリング３’は、外力を加えない
状態ではその内径が鋳鉄管１の外径よりも少し小さいし
まり嵌めとなるようにしている。また、このストッパリ
ング３’は、溝部３ｂがストッパリング３’の内周面３
ａにおける挿口先端寄り位置に形成された姿勢で配置さ
れ、この溝部３ｂにろう材からなるワイヤ１１を嵌入さ
せている。そして、ストッパリング３’の内周面３ａと
鋳鉄管１の挿口２におけるストッパリング３’を接合さ
せる箇所とにろう材用のフラックス（図示せず）が予め
塗布される。Conventionally, the stopper ring 3 'is integrally fixed to the insertion port 2 of the cast iron pipe 1 as described below to form the insertion projection 3. As shown in FIG. 4A, the stopper ring 3 ′ forming the insertion projection 3 has an inner diameter slightly smaller than the outer diameter of the cast iron pipe 1 when no external force is applied. ing. The stopper ring 3 ′ has a groove 3 b formed on the inner peripheral surface 3 of the stopper ring 3 ′.
The wire 11 made of a brazing material is fitted into the groove 3b in such a manner as to be formed at a position near the tip of the insertion opening in FIG. Then, a flux (not shown) for a brazing material is applied in advance to the inner peripheral surface 3a of the stopper ring 3 'and the portion of the insertion opening 2 of the cast iron pipe 1 where the stopper ring 3' is joined.
【０００４】次に、図４の（ｂ）に示すように、ワイヤ
１１を配設したストッパリング３’を、このストッパリ
ング３’の挿口先端側に配置される一端部３ｃを挿口奥
側に向けて押圧することにより、挿口外周面２ａに圧入
状態で外嵌させる。[0004] Next, as shown in FIG. 4 (b), the stopper ring 3 ′ on which the wire 11 is disposed is connected to one end 3 c of the stopper ring 3 ′ which is located at the front end side of the insertion opening. By pressing it toward the side, it is externally fitted in the insertion opening outer peripheral surface 2a in a press-fit state.
【０００５】この後、鋳鉄管１を加熱してストッパリン
グ３’の溝部３ｂ内のワイヤ１１を溶融させる。この場
合の加熱溶融方法としては、図５に示すように、鋳鉄管
１をその管軸心ｘが水平となる姿勢に配置して管軸心ｘ
を中心に回転させながら、鋳鉄管１の挿口内周面側から
だけ加熱することにより行っている。これにより、図４
の（ｃ）に示すように、ストッパリング３’と鋳鉄管１
の挿口２とをろう材１１’により接合させて挿口２の外
周に挿口突部３を形成する。Thereafter, the cast iron tube 1 is heated to melt the wire 11 in the groove 3b of the stopper ring 3 '. As a heating and melting method in this case, as shown in FIG. 5, the cast iron pipe 1 is disposed in a posture where the pipe axis x is horizontal, and the pipe axis x
Is performed by heating only from the inner peripheral surface side of the insertion opening of the cast iron tube 1 while rotating around the center. As a result, FIG.
(C), the stopper ring 3 'and the cast iron pipe 1
Is joined with a brazing material 11 ′ to form an insertion protrusion 3 on the outer periphery of the insertion hole 2.
【０００６】そして最後に、図４の（ｄ）に示すよう
に、挿口２の先端外周面と挿口突部３の挿口先端側部分
にかけて再度テーパ加工して先端ほど細くなるようにテ
ーパ面１２を形成する。ここで、このテーパ加工を行う
に際して、ストッパリング３’の溝部３ｂを含んだ部分
を削り取って、最終的に溝部３ｂを有しない状態でスト
ッパリング３’と挿口２とを接合させた状態として挿口
突部３を形成する。Finally, as shown in FIG. 4 (d), the outer peripheral surface of the front end of the insertion port 2 and the front end portion of the insertion projection 3 are tapered again so that the taper becomes thinner toward the front end. Surface 12 is formed. Here, when performing this taper processing, a portion including the groove 3b of the stopper ring 3 'is scraped off, and finally the stopper ring 3' and the insertion opening 2 are joined without the groove 3b. An insertion projection 3 is formed.
【０００７】この方法によれば、ストッパリング３’の
内周面３ａに溝部３ｂを形成し、この溝部３ｂにろう材
からなるワイヤ１１を配設しているため、十分な量のワ
イヤ１１を確保することができる。また、ストッパリン
グ３’と鋳鉄管１の挿口２との接合箇所が、図４の
（ｄ）に示すように、最終的にストッパリング３’の溝
部３ｂを有しない状態で接合された状態となるため、挿
口突部３と鋳鉄管１の挿口２との接合面積をより多く確
保できて、接合力を増加させることができる。According to this method, since the groove 3b is formed in the inner peripheral surface 3a of the stopper ring 3 'and the wire 11 made of brazing material is disposed in the groove 3b, a sufficient amount of the wire 11 is provided. Can be secured. Further, as shown in FIG. 4D, the joint between the stopper ring 3 'and the insertion opening 2 of the cast iron tube 1 is finally joined without the groove 3b of the stopper ring 3'. Therefore, a larger joint area between the insertion projection 3 and the insertion port 2 of the cast iron pipe 1 can be secured, and the joining force can be increased.
【０００８】なお、この後、ゴム輪８や心出しゴム輪
７，ロックリング６が予め配設された受口４内に挿口２
が挿入されるが、この際、挿口２のテーパ面１２により
ゴム輪８やロックリング６が案内されて拡径され、挿口
２の受口４内への挿入が許容される。[0008] Thereafter, the rubber ring 8, the centering rubber ring 7, and the lock ring 6 are inserted into the insertion port 4 provided in advance.
At this time, the rubber ring 8 and the lock ring 6 are guided by the tapered surface 12 of the insertion opening 2 to expand the diameter, and the insertion of the insertion opening 2 into the receiving opening 4 is allowed.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、従来の
鋳鉄管の挿口形成方法においては、ろう材１１’の加
熱、溶融作業を、鋳鉄管１の挿口内周面側からだけ加熱
することにより行っているため、挿口２とバックアップ
リング７との接合箇所で挿口２側に比べてバックアップ
リング７側の温度が低くなって、これらの間で温度差を
生じ、短時間で加熱した場合には温度むらを生じ易かっ
た。したがって、この場合には、ろう材１１’が安定し
て広げることが困難となり、十分な接合力を得ることが
できなくなるおそれがあった。However, in the conventional method for forming an opening in a cast iron pipe, the heating and melting work of the brazing material 11 'is performed by heating only from the inner peripheral surface side of the opening of the cast iron pipe 1. Therefore, the temperature of the backup ring 7 side is lower than that of the insertion port 2 side at the junction between the insertion port 2 and the backup ring 7, causing a temperature difference between them and heating in a short time. Was prone to uneven temperature. Therefore, in this case, it is difficult to stably spread the brazing material 11 ′, and there is a possibility that a sufficient joining force may not be obtained.
【００１０】本発明は上記問題を解決するもので、溶融
したろう材をストッパリングと鋳鉄管の挿口との間で良
好に広げることができて、十分な接合力を得ることがで
きる鋳鉄管の挿口突部形成方法を提供することを目的と
するものである。[0010] The present invention solves the above-mentioned problems, and a molten iron filler metal can be favorably spread between a stopper ring and an insertion opening of a cast iron pipe so that a sufficient joining force can be obtained. It is an object of the present invention to provide a method for forming an insertion projection.
【００１１】[0011]
【課題を解決するための手段】上記問題を解決するため
に本発明は、最終的に鋳鉄管の挿口突部となるストッパ
リングの内周面に溝部を形成し、このストッパリングの
溝部にろう材を配設し、このろう材を配設したストッパ
リングを、鋳鉄管の挿口と受口とが接続される接続部に
おける挿口外周面に外嵌させ、ろう材配設箇所を含む部
分を加熱してろう材を溶融させることにより、ストッパ
リングと鋳鉄管の挿口とをろう付け接合させて接続部離
脱防止用の挿口突部を形成する鋳鉄管の挿口突部形成方
法であって、ろう材配設箇所を含む部分を加熱するに際
し、ストッパリングの厚みと鋳鉄管の挿口の厚みとに応
じて、それぞれの厚みに比例させた加熱量でストッパリ
ングの外周側からと鋳鉄管の挿口内周側とから加熱する
ものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problem, the present invention is to form a groove on the inner peripheral surface of a stopper ring which finally becomes an insertion projection of a cast iron pipe, and to form a groove in the groove of the stopper ring. A brazing material is provided, and a stopper ring provided with the brazing material is externally fitted to an outer peripheral surface of the insertion port at a connection portion where the insertion port and the receiving port of the cast iron pipe are connected, and includes a brazing material disposing portion. A method for forming an insertion projection of a cast iron tube in which a stopper ring and an insertion opening of a cast iron pipe are brazed and joined to form an insertion projection for preventing a connection portion from being detached by heating a portion to melt a brazing material. When heating the portion including the brazing material disposing portion, depending on the thickness of the stopper ring and the thickness of the insertion opening of the cast iron pipe, from the outer peripheral side of the stopper ring with a heating amount proportional to each thickness. And from the inner peripheral side of the insertion opening of the cast iron tube.
【００１２】上記方法によれば、ストッパリングの外周
側からと鋳鉄管の挿口内周側とからの両方向から加熱す
るとともに、その加熱量をストッパリングの厚みと鋳鉄
管の挿口の厚みとに応じて比例させた量に設定したた
め、ろう材で接合する箇所においてのストッパリング側
の温度と挿口側の温度とが等しくなって温度差がなくな
り、ろう材を均一に加熱することができて加熱、溶融作
業を短時間で行うことができる。According to the above method, heating is performed in both directions from the outer peripheral side of the stopper ring and the inner peripheral side of the insertion opening of the cast iron tube, and the amount of heating is reduced by the thickness of the stopper ring and the thickness of the insertion opening of the cast iron tube. Since the temperature was set proportionally, the temperature on the stopper ring side and the temperature on the insertion side at the point where the brazing material was joined became equal, and there was no temperature difference, and the brazing material could be heated uniformly. Heating and melting operations can be performed in a short time.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。なお、従来と同機能のものには同
符号を付す。Embodiments of the present invention will be described below with reference to the drawings. The components having the same functions as those in the related art are denoted by the same reference numerals.
【００１４】図２の（ａ）に示すように、挿口突部３を
形成するストッパリング３’は、外力を加えない状態で
はその内径Ｄ１が鋳鉄管１の外径Ｄ２よりも少し小さい
しまり嵌めとなるようにしている。また、このストッパ
リング３’は、溝部３ｂがストッパリング３’の内周面
における挿口先端寄り位置に形成された姿勢で配置さ
れ、この溝部３ｂにろう材からなるワイヤ１１を嵌入さ
せている。そして、ストッパリング３’の内周面３ａと
鋳鉄管１の挿口２におけるストッパリング３’を接合さ
せる箇所とにろう材用のフラックス（図示せず）を予め
塗布する。さらに、ストッパリング３’の挿口先端側に
配置される箇所の外周を溝部３ｂの近傍箇所までテーパ
加工させ、このテーパ面３ｄから溝部３ｂまでのストッ
パリング３’の肉厚を薄くさせて薄肉部３ｅを形成して
いる。As shown in FIG. 2A, the inner diameter D1 of the stopper ring 3 'forming the insertion projection 3 is slightly smaller than the outer diameter D2 of the cast iron tube 1 when no external force is applied. It is made to fit. The stopper ring 3 ′ is disposed in such a manner that the groove 3 b is formed at a position near the tip of the insertion opening on the inner peripheral surface of the stopper ring 3 ′, and the wire 11 made of brazing material is fitted into the groove 3 b. . Then, a flux (not shown) for a brazing material is applied in advance to the inner peripheral surface 3a of the stopper ring 3 'and the portion of the insertion opening 2 of the cast iron pipe 1 where the stopper ring 3' is joined. Further, the outer periphery of a portion of the stopper ring 3 'located on the front end side of the insertion opening is tapered to a position near the groove portion 3b, and the thickness of the stopper ring 3' from the tapered surface 3d to the groove portion 3b is reduced to make it thinner. A portion 3e is formed.
【００１５】次に、図２の（ｂ），（ｃ）に示すよう
に、ワイヤ１１を配設したストッパリング３’を、この
ストッパリング３’の挿口先端側に配置される一端部３
ｃから挿口奥側に向けて押圧することにより、挿口外周
面２ａに圧入状態で外嵌させる。この場合に、ストッパ
リング３’を挿口２の外周面２ａに外嵌させるためにス
トッパリング３’の挿口先端側に配置される一端部３ｃ
を挿口奥側に向けて押圧すると、押圧点がストッパリン
グ３’の薄肉部３ｅよりも内周寄りであるため、ストッ
パリング３’の薄肉部３ｅを屈曲点としてストッパリン
グ３’の一端部３ｃ側が内側に変形する。これにより、
ストッパリング３’の溝部３ｂの開口側が狭められてワ
イヤ１１はストッパリング３’の溝部３ｂ内に確実に保
持されて、ストッパリング３’が溝部３ｂから脱落する
ことが防止される。Next, as shown in FIGS. 2 (b) and 2 (c), the stopper ring 3 'on which the wire 11 is disposed is connected to the one end 3 of the stopper ring 3' at the front end of the insertion opening.
By pressing from c to the back side of the insertion hole, it is externally fitted in the insertion outer peripheral surface 2a in a press-fit state. In this case, in order to fit the stopper ring 3 ′ to the outer peripheral surface 2 a of the insertion opening 2, one end portion 3 c disposed on the distal end side of the insertion opening of the stopper ring 3 ′
Is pressed toward the inner side of the insertion opening, the pressing point is closer to the inner circumference than the thin portion 3e of the stopper ring 3 ', so that the thin portion 3e of the stopper ring 3' is used as a bending point and one end of the stopper ring 3 '. The 3c side is deformed inward. This allows
Since the opening side of the groove 3b of the stopper ring 3 'is narrowed, the wire 11 is securely held in the groove 3b of the stopper ring 3', and the stopper ring 3 'is prevented from dropping out of the groove 3b.
【００１６】この後、鋳鉄管１を加熱してストッパリン
グ３’の溝部３ｂ内のワイヤ１１を溶融させる。この場
合の加熱溶融方法としては、図１に示すように、鋳鉄管
１の挿口先端部側、すなわちワイヤ１１を配設している
側が上向きとなるように傾斜させた姿勢で管軸心ｘを中
心に回転させながら、鋳鉄管１の内周側からだけでな
く、ストッパリング３’の外周側からも加熱することに
より行う。この際の、傾斜角度θとしては５度〜６０度
が望ましい。また、このときの加熱量は、ストッパリン
グ３’の厚みと鋳鉄管１の挿口２の厚みとに応じて、そ
れぞれの厚みに比例させた加熱量とする。すなわち、ス
トッパリング３’の厚みが３mmであり、鋳鉄管１の挿口
２の厚みが６mmであった場合には、ストッパリング３’
の外周面３ｆからの加熱量と挿口２の内周面２ｃからの
加熱量が１対２となるように加熱する。Thereafter, the cast iron tube 1 is heated to melt the wire 11 in the groove 3b of the stopper ring 3 '. As a heating and melting method in this case, as shown in FIG. 1, the pipe axis x is tilted so that the tip end side of the insertion opening of the cast iron pipe 1, that is, the side on which the wire 11 is disposed is upward. While rotating not only from the inner peripheral side of the cast iron tube 1 but also from the outer peripheral side of the stopper ring 3 '. At this time, the inclination angle θ is desirably 5 degrees to 60 degrees. In addition, the heating amount at this time is set to a heating amount proportional to the thickness of the stopper ring 3 ′ and the thickness of the insertion opening 2 of the cast iron pipe 1 according to the thickness. That is, when the thickness of the stopper ring 3 'is 3 mm and the thickness of the insertion opening 2 of the cast iron pipe 1 is 6 mm, the stopper ring 3'
Is heated so that the amount of heating from the outer peripheral surface 3f and the amount of heating from the inner peripheral surface 2c of the insertion opening 2 become 1: 2.
【００１７】この結果、溶融したろう材１１’が、挿口
２の外周面２ａとストッパリング３’の内周面３ａとの
隙間における溝部３ｂより下方の側である挿口２の奥側
にその重量により流れて良好に広がると同時に、ろう材
１１’で接合する箇所においてのストッパリング３’側
の温度と挿口２側の温度とが等しくなって温度差がなく
なり、ろう材１１’を均一に加熱することができて加
熱、溶融作業を短時間で行うことができ、挿口２と挿口
突部３との間で十分な接合力を得ることができる。この
ようにして、図２の（ｄ）に示すように、ストッパリン
グ３’と鋳鉄管１の挿口２とをろう材１１’により接合
させて挿口２の外周に挿口突部３を形成する。As a result, the molten brazing material 11 ′ is located in the gap between the outer peripheral surface 2 a of the insertion opening 2 and the inner peripheral surface 3 a of the stopper ring 3 ′ on the inner side of the insertion opening 2 which is below the groove 3 b. At the same time, the temperature on the stopper ring 3 'side and the temperature on the insertion port 2 side at the portion to be joined with the brazing material 11' are equalized and the temperature difference disappears, and the brazing material 11 ' Heating and melting can be performed uniformly in a short time, and a sufficient joining force can be obtained between the insertion port 2 and the insertion projection 3. In this way, as shown in FIG. 2D, the stopper ring 3 'and the insertion port 2 of the cast iron pipe 1 are joined by the brazing material 11', and the insertion projection 3 is formed on the outer periphery of the insertion port 2. Form.
【００１８】そして最後に、図２の（ｅ）に示すよう
に、挿口２の先端外周面と挿口突部３の挿口先端側部分
にかけて再度テーパ加工して先端ほど細くなるようにテ
ーパ面１２を形成する。ここで、このテーパ加工を行う
に際して、ストッパリング３’の溝部３ｂを含んだ部分
を削り取って、最終的に溝部３ｂを有しない状態でスト
ッパリング３’と挿口２とを接合させた状態として挿口
突部３を形成する。Finally, as shown in FIG. 2E, the outer peripheral surface of the front end of the insertion port 2 and the front end portion of the insertion projection 3 are tapered again so that the front end becomes thinner. Surface 12 is formed. Here, when performing this taper processing, a portion including the groove 3b of the stopper ring 3 'is scraped off, and finally the stopper ring 3' and the insertion opening 2 are joined without the groove 3b. An insertion projection 3 is formed.
【００１９】なお、鋳鉄管１の内周側だけから加熱する
従来の方法と、鋳鉄管１の内周側およびストッパリング
３’の外周側からそれぞれの厚みに応じて加熱する本願
発明の方法とを比較すべく、直径２．４mmのワイヤ１１
からなる銀ろうを配設した口径９３mm，厚み２．５mm，
幅３２．４mmのストッパリング３’を、鋳鉄管１にろう
付けした場合で比べてみた。その結果、従来の方法で
は、加熱時間として約４０秒間要しながら、ろう材１
１’の広がり方が不良の場合が多く、離脱阻止力も不安
定で、０．２Ｄｔｆ程度しか得られなかったのに対し、
本願発明の方法では、加熱時間として約３０秒間で済み
ながら、ろう材１１’の広がり方が安定しており、離脱
阻止力も安定して０．４５Ｄｔｆと十分使用に耐え得る
値が得られた。The conventional method of heating only from the inner peripheral side of the cast iron pipe 1 and the method of the present invention of heating from the inner peripheral side of the cast iron pipe 1 and the outer peripheral side of the stopper ring 3 'according to the respective thicknesses. To compare 2.4 mm wire 11 mm
93mm diameter, 2.5mm thick, with silver brazing made of
The stopper ring 3 ′ having a width of 32.4 mm was compared with a case where the stopper ring 3 ′ was brazed to the cast iron tube 1. As a result, the conventional method requires about 40 seconds as a heating time,
In many cases, the spread of 1 ′ was poor, the detachment prevention force was unstable, and only about 0.2 Dtf was obtained.
In the method of the present invention, the spread of the brazing material 11 ′ is stable, and the detachment preventing force is also stable and 0.45 Dtf, which is a value that can sufficiently withstand use, is obtained while the heating time is about 30 seconds.
【００２０】なお、上記実施の形態のように鋳鉄管１を
傾斜させることなく、水平姿勢のままで本願発明を適用
してもよい。また、鋳鉄管１やストッパリング３’の大
きさや、ろう材１０の種類が上記のものに限られるもの
ではないことは申すまでもない。It is to be noted that the present invention may be applied in a horizontal posture without inclining the cast iron tube 1 as in the above embodiment. It goes without saying that the size of the cast iron tube 1 and the stopper ring 3 'and the type of the brazing material 10 are not limited to those described above.
【００２１】[0021]
【発明の効果】以上のように本発明の鋳鉄管の挿口突部
形成方法によれば、ストッパリングの外周側からと鋳鉄
管の挿口内周側とからの両方向から加熱するとともに、
その加熱量をストッパリングの厚みと鋳鉄管の挿口の厚
みとに応じて比例させた量に設定することにより、ろう
材で接合する箇所においてのストッパリング側の温度と
挿口側の温度とが等しくなって温度差がなくなり、ろう
材を均一に加熱することができて、加熱、溶融作業を短
時間で行うことができながら、挿口突部による離脱阻止
力を高めることができて信頼性を向上させることができ
る。As described above, according to the method for forming an insertion projection of a cast iron pipe of the present invention, heating is performed from both directions from the outer peripheral side of the stopper ring and the inner peripheral side of the insertion port of the cast iron pipe.
By setting the amount of heating to an amount proportional to the thickness of the stopper ring and the thickness of the insertion hole of the cast iron tube, the temperature of the stopper ring side and the temperature of the insertion side at the place where the brazing material is joined are used. And the temperature difference disappears, the brazing material can be heated uniformly, and the heating and melting work can be performed in a short time, while the detachment prevention force by the insertion projection can be increased and the reliability can be improved. Performance can be improved.
【図１】本発明の実施の形態にかかる鋳鉄管の挿口突部
形成方法における加熱溶融工程を示す断面図である。FIG. 1 is a cross-sectional view showing a heating and melting step in a method for forming an insertion projection of a cast iron pipe according to an embodiment of the present invention.
【図２】（ａ）〜（ｅ）はそれぞれ本発明の実施の形態
にかかる鋳鉄管の挿口突部形成方法における各工程を示
す断面図である。FIGS. 2A to 2E are cross-sectional views showing respective steps in a method for forming an insertion projection of a cast iron pipe according to an embodiment of the present invention.
【図３】鋳鉄管の継手箇所の断面図である。FIG. 3 is a sectional view of a joint portion of a cast iron pipe.
【図４】（ａ）〜（ｄ）はそれぞれ従来の鋳鉄管の挿口
突部形成方法における各工程を示す断面図である。FIGS. 4A to 4D are cross-sectional views showing respective steps in a conventional method for forming an insertion projection of a cast iron pipe.
【図５】従来の鋳鉄管の挿口突部形成方法における加熱
溶融工程を示す断面図である。FIG. 5 is a cross-sectional view showing a heating and melting step in a conventional method for forming an insertion projection of a cast iron tube.
１ 鋳鉄管 ２ 挿口 ２ａ 外周面 ２ｃ 内周面 ３ 挿口突部 ３’ ストッパリング ３ａ 内周面 ３ｂ 溝部 ３ｆ 外周面 １１ ワイヤ １１’ ろう材 DESCRIPTION OF SYMBOLS 1 Cast iron pipe 2 Insert 2a Outer peripheral surface 2c Inner peripheral surface 3 Insert protrusion 3 'Stopper ring 3a Inner peripheral surface 3b Groove 3f Outer peripheral surface 11 Wire 11' Brazing material
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ１６Ｌ 21/08 Ｆ１６Ｌ 21/08 Ｂ (56)参考文献 特開 昭49−76752（ＪＰ，Ａ) 特開 平７−27266（ＪＰ，Ａ) 特許2778909（ＪＰ，Ｂ２) 実公 昭45−19975（ＪＰ，Ｙ１) 実公 昭46−21147（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 1/18 B23K 1/19 C21D 9/08 F16L 13/08 F16L 13/12 F16L 21/00 F16L 21/02 F16L 21/08 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 Identification code FI F16L 21/08 F16L 21/08 B (56) References JP-A-49-76752 (JP, A) JP-A-7-27266 ( JP, A) Japanese Patent No. 2778909 (JP, B2) Japanese Utility Model No. 45-9975 (JP, Y1) Japanese Utility Model No. 46-21147 (JP, Y1) (58) Fields investigated (Int. Cl. 7 , DB name) B23K 1/18 B23K 1/19 C21D 9/08 F16L 13/08 F16L 13/12 F16L 21/00 F16L 21/02 F16L 21/08
Claims (1)
パリングの内周面に溝部を形成し、このストッパリング
の溝部にろう材を配設し、このろう材を配設したストッ
パリングを、鋳鉄管の挿口と受口とが接続される接続部
における挿口外周面に外嵌させ、ろう材配設箇所を含む
部分を加熱してろう材を溶融させることにより、ストッ
パリングと鋳鉄管の挿口とをろう付け接合させて接続部
離脱防止用の挿口突部を形成する鋳鉄管の挿口突部形成
方法であって、ろう材配設箇所を含む部分を加熱するに
際し、ストッパリングの厚みと鋳鉄管の挿口の厚みとに
応じて、それぞれの厚みに比例させた加熱量でストッパ
リングの外周側および鋳鉄管の挿口内周側から加熱する
ことを特徴とする鋳鉄管の挿口突部形成方法。A groove is formed in an inner peripheral surface of a stopper ring which finally becomes an insertion projection of a cast iron pipe, a brazing material is provided in the groove of the stopper ring, and a stopper provided with the brazing material is provided. The stopper ring is formed by externally fitting the ring to the outer peripheral surface of the insertion port at the connection portion where the insertion port and the receiving port of the cast iron tube are connected, and heating the portion including the brazing material disposing portion to melt the brazing material. A method for forming an insertion projection of a cast iron pipe, in which an insertion projection for preventing connection portion detachment is formed by brazing and joining an insertion opening of a cast iron pipe to a portion including a brazing material disposing portion. In this case, according to the thickness of the stopper ring and the thickness of the insertion opening of the cast iron tube, heating is performed from the outer peripheral side of the stopper ring and the inner peripheral side of the insertion opening of the cast iron tube with a heating amount proportional to each thickness. A method for forming an insertion projection of a cast iron tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23795195A JP3267475B2 (en) | 1995-09-18 | 1995-09-18 | Method of forming the insertion protrusion of cast iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23795195A JP3267475B2 (en) | 1995-09-18 | 1995-09-18 | Method of forming the insertion protrusion of cast iron pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0979439A JPH0979439A (en) | 1997-03-25 |
| JP3267475B2 true JP3267475B2 (en) | 2002-03-18 |
Family
ID=17022890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23795195A Expired - Fee Related JP3267475B2 (en) | 1995-09-18 | 1995-09-18 | Method of forming the insertion protrusion of cast iron pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3267475B2 (en) |
-
1995
- 1995-09-18 JP JP23795195A patent/JP3267475B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0979439A (en) | 1997-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6398472B1 (en) | Blind rivet assembly with localized attachment and methods of assembling | |
| JP3167268B2 (en) | Forming method of the projection of the tube opening | |
| JP3267475B2 (en) | Method of forming the insertion protrusion of cast iron pipe | |
| JP3267476B2 (en) | Method of forming the insertion protrusion of cast iron pipe | |
| JP3148109B2 (en) | Method for forming the insertion protrusion of cast iron pipe | |
| JP3267477B2 (en) | Method of forming the insertion protrusion of cast iron pipe | |
| JP3537284B2 (en) | METHOD FOR FORMING PROJECTION OF TUBE INSERT AND POSITIONING ROLLER FOR THE SAME | |
| JP3420873B2 (en) | Forming method of the projection of the tube opening | |
| JP3323094B2 (en) | Method of forming protrusion of tube insertion | |
| JP3342801B2 (en) | Method of forming protrusion of tube insertion | |
| JPS606713Y2 (en) | Metal pipe fitting device | |
| JP3317832B2 (en) | Method of forming protrusion of tube insertion | |
| JPH0740058A (en) | Manufacture of eye joint | |
| JP3989272B2 (en) | Method and apparatus for forming tube insertion protrusion | |
| JPH05118483A (en) | Hose coupling | |
| JPH08247350A (en) | Cast iron tube insertion port stopper ring connecting method | |
| JPH11291027A (en) | Brazing method and brazed parts | |
| JPH0656231B2 (en) | Metal tube with connection flange and method of manufacturing the same | |
| JP3822039B2 (en) | Pipe member brazing joining method and pipe joining structure | |
| JP2541548Y2 (en) | Insert welding flange | |
| JP3420874B2 (en) | Forming method of the projection of the tube opening | |
| JP3148125B2 (en) | Joint structure between members | |
| JPH10185028A (en) | Projected part forming method for pipe spigot | |
| JP2001182876A (en) | Ring for forming protrusion on inserting part for pipe and method for forming protrusion on inserting part | |
| JPS6224513Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |