JP2500032B2 - Processing method of pipe tip - Google Patents
Processing method of pipe tipInfo
- Publication number
- JP2500032B2 JP2500032B2 JP17964691A JP17964691A JP2500032B2 JP 2500032 B2 JP2500032 B2 JP 2500032B2 JP 17964691 A JP17964691 A JP 17964691A JP 17964691 A JP17964691 A JP 17964691A JP 2500032 B2 JP2500032 B2 JP 2500032B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- punch
- ring
- tip
- clamp
- 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
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、カーエアコン配管等
に用いられるパイプ先端の加工方法に係り、特に、Ｏリ
ング等のシール部材を装着する部分の加工方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a tip of a pipe used for a car air conditioner piping, etc., and more particularly to a method of processing a portion to which a seal member such as an O ring is attached.
【０００２】[0002]
【従来の技術】従来、この種のパイプ先端にＯリング等
のシール部材を装着する場合には、パイプの先端外周面
に２つのリング状膨出部を形成するとともに、その両リ
ング状膨出部の間にＯリング等のシール部材を設けてい
る。2. Description of the Related Art Conventionally, when a sealing member such as an O-ring is attached to the tip of this type of pipe, two ring-shaped bulges are formed on the outer peripheral surface of the pipe tip and both ring-shaped bulges are formed. A seal member such as an O-ring is provided between the parts.
【０００３】ここで、上記のような２つのリング状膨出
部は図３に示すような加工方法で形成されている。すな
わち、この加工方法によれば、図３（ａ）に示す如くク
ランプ１で固定したパイプ２の先端外周面にパンチ３で
第１番目のリング状膨出部２ａを形成する。その後、図
３（ｂ）に示す如く他のパンチ７で第２番目のリング状
膨出部２ｂを形成するが、この際、クランプ１とパンチ
７との間には、第２のクランプとして分割式の成形型１
４を介在させている。Here, the above-mentioned two ring-shaped bulges are formed by the processing method shown in FIG. That is, according to this processing method, as shown in FIG. 3A, the punch 3 forms the first ring-shaped bulge 2a on the outer peripheral surface of the tip of the pipe 2 fixed by the clamp 1. Thereafter, as shown in FIG. 3B, the second ring-shaped bulging portion 2b is formed by another punch 7, and at this time, the clamp 1 and the punch 7 are divided as a second clamp. Mold 1
4 is interposed.
【０００４】ところで、上記分割式の成形型１４は、図
４に示す如く分割線Ｏ1 ，Ｏ1 を境に２つに分かれてパ
イプ２外周面側に配設されるとともに、分割線Ｏ1 ，Ｏ
1 上に貫通穴１５を有するもので、貫通穴１５は、第２
のクランプ（通称、サブクランプと称する。）としての
考えから、パイプ２の径と略等しく設けられている。 Meanwhile, the mold 14 of the split, as well is disposed in the pipe 2 the outer peripheral surface divided into two in the boundary dividing lines O 1, O 1 as shown in FIG. 4, a dividing line O 1 , O
1 has a through hole 15 on the top, and the through hole 15 has a second
As a clamp (commonly called a sub clamp)
From the idea, the diameter is set to be substantially equal to the diameter of the pipe 2.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の加工方法にあっては、貫通穴１５とパイプ２
との径が略等しく設けられていることから、貫通穴１５
にパイプ２をセットしたとき、パイプ２と成形型１４の
間にはパイプ２全体の膨脹とは無関係の、自然に生じる
微少隙間しかなく、このような微少隙間では、第２番目
のリング状膨出部２ｂ形成時にパイプ２が全体的に成形
型へ向かって膨脹すると、パイプ２全体が成形型１４を
押圧し、これによりパイプ２の一部が成形型の分割線Ｏ
1 ，Ｏ 1 上の隙間に膨出し、これが第２番目のリング状
膨出部２ｂと第１番目のリング状膨出部２ａとの間にバ
リの如く鋭利な分割面跡として残る。 However, in such a conventional processing method, the through hole 15 and the pipe 2 are not provided.
Since the diameters of and are substantially equal, the through hole 15
When the pipe 2 is set in the
In between occurs naturally, independent of the expansion of the entire pipe 2.
There are only minute gaps, and in such minute gaps, the second
The pipe 2 is entirely formed when the ring-shaped bulge 2b is formed.
As it expands toward the mold, the entire pipe 2 moves toward the mold 14.
By pressing, the pipe 2 is partially divided by the dividing line O of the mold.
It swells in the gap above 1 , O 1 and this is the second ring
Between the bulging portion 2b and the first ring-shaped bulging portion 2a,
It remains as a sharp division surface mark like Li.
【０００６】また、上記両リング状膨出部２ａ，２ｂの
間にＯリング等のシール部材を装着する際は、上記の如
き鋭利な分割面跡を表面処理して滑らかに仕上げる工程
が必要になり、非常に手間がかかる等の問題点がある。Further, when a seal member such as an O-ring is mounted between the ring-shaped bulging portions 2a and 2b, a step of surface-treating the sharp dividing surface traces as described above to finish smoothly is required. There is a problem that it takes a lot of time and labor.
【０００７】[0007]
【課題を解決するための手段】この発明は上述の事情に
鑑みてなされたもので、その目的とするところは、分割
式の成形型を用いる場合でも、パイプの先端外周面に鋭
利な分割面跡を残さずにリング状膨出部を形成すること
にあり、上記目的を達成するためにこの発明は、パイプ
を固定するクランプと、このクランプに固定されたパイ
プの先端側に配置される第１または第２のパンチと、上
記パイプが挿入される貫通穴を有するとともに、この貫
通穴を境に分割してパイプの先端外周面に配置される分
割式成形型とを用い、上記クランプにパイプを固定した
後、このパイプの先端をクランプ側に向かって第１のパ
ンチで押圧し、これにより当該パイプの先端外周面に第
１番目のリング状膨出部を形成し、その後、上記第１の
パンチに代えて第２のパンチを用い、この第２のパンチ
とクランプとの間に成形型を介挿し、かつ上記クランプ
に固定のパイプを分割式成形型の貫通穴に挿入セットし
た後、そのパイプの先端を成形型側に向かって第２のパ
ンチで押圧し、これにより当該パイプの先端外周面に第
２番目のリング状膨出部を形成するパイプ先端の加工方
法であって、上記クランプに固定のパイプを分割式成形
型の貫通穴に挿入セットする際、この貫通穴とパイプと
の間に、第２番目のリング状膨出部を形成するときのパ
イプ全体の膨脹を吸収できる程度の隙間部を設けたこと
を特徴とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a sharp split surface on the outer peripheral surface of the tip of a pipe even when a split mold is used. lies in forming the ring-shaped bulging portion without leaving a trace, the present invention in order to achieve the above object, a pipe
Clamp that secures the
The first or second punch placed on the tip side of the
It has a through hole for the pipe to be inserted and
The amount that is divided on the through hole and placed on the outer peripheral surface of the tip of the pipe
A pipe was fixed to the clamp using a split mold.
Then, place the tip of this pipe toward the clamp side and
The pipe to push it against the outer peripheral surface of the tip of the pipe.
The first ring-shaped bulge is formed, and then the first
The second punch is used instead of the punch, and the second punch is used.
Insert the molding die between the clamp and
Insert the fixed pipe into the through hole of the split mold and set.
Then, place the tip of the pipe toward the mold side and
The pipe to push it against the outer peripheral surface of the tip of the pipe.
How to process the tip of the pipe that forms the second ring-shaped bulge
Method, the fixed pipe is divided into the above clamps
When inserting and setting in the through hole of the mold,
Of the second ring-shaped bulge between the
It is characterized in that a gap is provided so that the expansion of the entire ip can be absorbed .
【０００８】[0008]
【作用】この発明によれば、第２番目のリング状膨出部
形成時にパイプが全体的に分割式の成形型へ向かって膨
脹しても、貫通穴とパイプとの間にはパイプ膨脹量を吸
収できる余裕（隙間部１０）があることから、パイプが
成形型に接触しない、あるいはパイプ全体でなく、パイ
プの一部が成形型に接して押圧するのみとなるので、成
形型における分割線上の隙間にパイプが膨出するのを阻
止でき、かつ第２番目のリング状膨出部と第１番目のリ
ング状膨出部との間に鋭利な分割面跡が生ずるのを防止
できる。According to the present invention, the second ring-shaped bulge portion is formed.
During formation, the pipe expands toward a generally split mold.
Even if it expands, the expansion amount of the pipe is absorbed between the through hole and the pipe.
Since there is a room (gap 10) to store the pipe,
Since the pipe does not come into contact with the molding die, or only a part of the pipe comes into contact with and presses the molding die instead of the entire pipe, it is possible to prevent the pipe from bulging into the gap on the parting line in the molding die. It is possible to prevent a sharp division surface mark from being generated between the second ring-shaped bulge portion and the first ring-shaped bulge portion.
【０００９】[0009]
【実施例】以下、この発明に係るパイプ先端の加工方法
を適用した装置の一実施例について図１及び図２を用い
て説明する。なお、従来と同一部材には同一符号を付
す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus to which the pipe tip processing method according to the present invention is applied will be described below with reference to FIGS. The same members as those of the related art are designated by the same reference numerals.
【００１０】この装置は図１（ａ）に示す如く膨出部形
成用クランプ１を備えており、このクランプ１は１つの
クランプ基準面１ａが複数個に分離結合するように形成
されている。そして、このようなクランプ１でパイプを
固定する場合には、クランプ基準面１ａが分離する部分
にパイプ２を挿入するとともに、パイプ２の先端側をク
ランプ基準面１ａから所定の量だけ突出させてセットす
る。As shown in FIG. 1 (a), this apparatus is provided with a bulging portion forming clamp 1, and this clamp 1 is formed so that one clamp reference surface 1a is separated and connected to a plurality. When fixing the pipe with such a clamp 1, the pipe 2 is inserted into a portion where the clamp reference surface 1a is separated, and the tip end side of the pipe 2 is protruded from the clamp reference surface 1a by a predetermined amount. set.
【００１１】また、上記パイプ２の一端側には膨出部形
成用パンチ３を有し、パンチ３には上記クランプ基準面
１ａと向かい合うようにパンチ基準面３ａが設けられて
おり、そのパンチ基準面３ａにはパイプ２の径よりも大
径の膨出部生成部４が穿設されている。A bulging portion forming punch 3 is provided on one end side of the pipe 2, and the punch reference surface 3a is provided on the punch 3 so as to face the clamp reference surface 1a. The surface 3a is provided with a bulging portion generating portion 4 having a diameter larger than that of the pipe 2.
【００１２】さらに、上記膨出部生成部４の中心には止
まり穴状のパイプ挿入穴５が設けられており、このパイ
プ挿入穴５にはパイプ２の内径よりも小径のマンドレル
６が内蔵されている。Further, a blind hole-shaped pipe insertion hole 5 is provided at the center of the bulging portion generating portion 4, and a mandrel 6 having a diameter smaller than the inner diameter of the pipe 2 is built in the pipe insertion hole 5. ing.
【００１３】ところで、上記のようなパンチ（以下、１
ｓｔパンチという）３は、パイプ２の外周面に第１番目
のリング状膨出部２ａを形成するものであるが、第２番
目のリング状膨出部２ｂを形成する場合には、上記１ｓ
ｔパンチ３に代えて図１（ｂ）に示すような他のパンチ
７（以下、２ｎｄパンチという）を用いる。ここで、第
２番目のリング状膨出部２ｂはＯリング（図示省略）の
抜け止めとして形成されるもので、上記Ｏリングは両リ
ング状膨出部２ａ，２ｂの間に装着される。なお、上記
２ｎｄパンチ７の基本的な構造は１ｓｔパンチ３と同様
なため、その詳細説明は省略する。By the way, the above punch (hereinafter referred to as 1
st punch) 3 forms the first ring-shaped bulge portion 2a on the outer peripheral surface of the pipe 2, but when forming the second ring-shaped bulge portion 2b, the above-mentioned 1s
Instead of the t punch 3, another punch 7 (hereinafter referred to as a 2nd punch) as shown in FIG. 1B is used. Here, the second ring-shaped bulging portion 2b is formed as a retaining member for an O-ring (not shown), and the O-ring is mounted between the ring-shaped bulging portions 2a and 2b. Since the basic structure of the second punch 7 is the same as that of the first punch 3, detailed description thereof will be omitted.
【００１４】クランプ１と１ｓｔ又は２ｎｄパンチ３，
７との間には、分割式の成形型８が設けられており、こ
の分割式の成形型８は、図２に示す如く分割線Ｏ1 ，Ｏ
1 を境に２つに分かれてパイプ２の先端外周面に配設さ
れるとともに、分割線Ｏ1 ，Ｏ1 上に貫通穴９を有する
ものである。つまり成形型８は貫通穴９を境に分割する
ように構成されており、その貫通穴９の径はパイプ２の
径よりやや大きく設けられている。このため、成形型８
が上記分割線Ｏ 1 ，Ｏ 1 上で一体に結合し、かつ貫通穴
９にパイプ２が挿入セットされているときは、上記の如
く貫通穴９の径をパイプ２の径よりやや大きく設けた分
だけ、パイプ２と成形型８の貫通穴９との間に隙間部１
０が形成される。この隙間部１０は、第２番目のリング
状膨出部２ｂを形成するときにパイプ２全体が膨脹し、
これによりパイプ２の一部が成形型８の分割線上の隙間
に膨出するのを阻止するものであるから、当該隙間部１
０の大きさは、第２番目のリング状膨出部２ｂを形成す
るときのパイプ２全体の膨脹を吸収できる程度である。
要するに、従来パイプ２と成形型１４の間に生じる微少
隙間はパイプ２全体の膨脹を考慮したものでなく、パイ
プ２全体の膨脹とは無関係の、自然に生じる単なる隙間
であるのに対し、本実施例の隙間部１０は自然に生じる
単なる隙間でなく、パイプ２全体の膨脹を吸収できる程
度の大きさであり、パイプ２全体の膨脹と密接な関係を
有するものである。 Clamp 1 and 1st or 2nd punch 3,
7, a split-type molding die 8 is provided, and the split-type molding die 8 has split lines O 1 , O as shown in FIG.
The pipe 2 is divided into two parts at the boundary 1 and is arranged on the outer peripheral surface of the tip of the pipe 2, and has a through hole 9 on the dividing lines O 1 and O 1 . That is, the molding die 8 is divided with the through hole 9 as a boundary.
Is constructed as a diameter of the through hole 9 is provided slightly larger than the diameter of the pipe 2. Therefore, the molding die 8
Are integrally connected on the dividing lines O 1 and O 1 and have through holes.
When the pipe 2 is inserted and set in 9,
The diameter of the through hole 9 is slightly larger than the diameter of the pipe 2.
Only the gap 1 between the pipe 2 and the through hole 9 of the molding die 8
0 is formed. This gap 10 is the second ring
The entire pipe 2 expands when forming the bulging portion 2b,
As a result, a part of the pipe 2 has a gap on the dividing line of the molding die 8.
Since it prevents the swelling in the gap 1,
A size of 0 forms the second ring-shaped bulge 2b.
It is only to the extent that the expansion of the entire pipe 2 when absorbing is absorbed.
In short, the minute amount generated between the conventional pipe 2 and the molding die 14
The gap does not take into consideration the expansion of the entire pipe 2,
A natural gap that is not related to the expansion of the entire
In contrast, the gap portion 10 of this embodiment naturally occurs.
Not just a gap, but enough to absorb the expansion of the entire pipe 2.
It has a close relationship with the expansion of the pipe 2 as a whole.
I have.
【００１５】次に、上記の如く構成された装置の動作に
ついて図１及び図２を用いて説明する。Next, the operation of the apparatus configured as described above will be described with reference to FIGS. 1 and 2.
【００１６】この装置によれば、図１（ａ）に示す如く
１ｓｔパンチ３のマンドレル６をパイプ２の内部に挿入
しながら、１ｓｔパンチ３のパイプ挿入穴５にパイプ２
を嵌合させ、このような状態のまま１ｓｔパンチ３をク
ランプ１側へ移動させて行き、パンチ基準面３ａをクラ
ンプ基準面１ａに強く押し付ける。これにより、膨出部
生成部４にパイプ２の一部が膨出し、かつパイプ２の外
周面に第１番目のリング状膨出部２ａが形成される。According to this apparatus, as shown in FIG. 1A, the mandrel 6 of the 1st punch 3 is inserted into the pipe 2, and the pipe 2 is inserted into the pipe insertion hole 5 of the 1st punch 3.
And the 1st punch 3 is moved to the clamp 1 side in such a state, and the punch reference surface 3a is strongly pressed against the clamp reference surface 1a. As a result, a part of the pipe 2 swells in the bulging portion generating portion 4, and the first ring-shaped bulging portion 2a is formed on the outer peripheral surface of the pipe 2.
【００１７】その後、図１（ｂ）に示す如く上記１ｓｔ
パンチ３に代えて２ｎｄパンチ７を設置してから、図２
に示すように分割式の成形型８を分割線Ｏ1 ，Ｏ1 上で
結合させる。この際、貫通穴９の径がパイプ２の径より
やや大きく設けた分だけ、パイプ２と成形型８との間に
間隙部１０が形成される。After that, as shown in FIG.
After installing the 2nd punch 7 in place of the punch 3, FIG.
As shown in FIG. 3, the split mold 8 is joined on the split lines O 1 , O 1 . At this time, the gap portion 10 is formed between the pipe 2 and the molding die 8 by the amount that the diameter of the through hole 9 is slightly larger than the diameter of the pipe 2.
【００１８】このようにして、分割式の成形型８を２ｎ
ｄパンチ７とクランプ１との間に介在させた後、２ｎｄ
パンチ７のマンドレル１１をパイプ２の内部に挿入しな
がら、２ｎｄパンチ７のパイプ挿入穴１２にパイプ２を
嵌合させ、このような状態のまま、２ｎｄパンチ７をク
ランプ１側へ移動させて行き、パンチ基準面７ａを分割
式の成形型８に強く押し付ける。In this way, the split type molding die 8 is
2nd after interposing between the punch 7 and the clamp 1.
While inserting the mandrel 11 of the punch 7 into the pipe 2, the pipe 2 is fitted into the pipe insertion hole 12 of the 2nd punch 7, and the 2nd punch 7 is moved to the clamp 1 side in this state. , The punch reference surface 7a is strongly pressed against the split mold 8.
【００１９】これにより、膨出部生成部１３にパイプ２
の一部が膨出して、パイプ２の外周面に第２番目のリン
グ状膨出部２ｂが形成される。これと同時に、パイプ２
が全体的に分割式の成形型８へ向かって膨脹するが、そ
れは間隙部１０によりパイプ２の一部が成形型８に接し
て押圧するのみとなる。As a result, the pipe 2 is attached to the bulging portion generating portion 13.
Of the second ring-shaped bulge 2b is formed on the outer peripheral surface of the pipe 2. At the same time, pipe 2
Expands toward the split mold 8 as a whole, but the gap 10 only presses a part of the pipe 2 in contact with the mold 8.
【００２０】すなわち、上記実施例の加工方法は、パイ
プ２を分割式成形型８の貫通穴９に挿入セットする際、
貫通穴９とパイプ２との間に隙間部１０を設け、この隙
間部１０は第２番目のリング状膨出部２ｂを形成すると
きのパイプ２全体の膨脹を吸収できる程度の大きさとし
たものである。このため第２番目のリング状膨出部形成
時にパイプが全体的に分割式の成形型へ向かって膨脹し
ても、貫通穴とパイプとの間にはパイプ膨脹量を吸収で
きる余裕（隙間部１０）があることから、パイプが成形
型に接触しない、あるいはパイプ全体でなく、パイプの
一部が成形型に接して押圧するのみとなるので、成形型
における分割線上の隙間にパイプが膨出するのを阻止で
き、かつ第２番目のリング状膨出部と第１番目のリング
状膨出部との間に鋭利な分割面跡が生ずるのを防止でき
る。 That is, the processing method of the above embodiment is
When inserting the insert 2 into the through hole 9 of the split mold 8
A gap 10 is provided between the through hole 9 and the pipe 2,
The interspace 10 forms the second ring-shaped bulge 2b
The size of the mushroom pipe 2 should be large enough to absorb the expansion.
It is a thing. Therefore, the second ring-shaped bulge formation
Sometimes the pipe expands towards a generally split mold
However, the amount of pipe expansion can be absorbed between the through hole and the pipe.
Since there is a margin (gap 10) that can be formed, the pipe is molded
Since it does not come into contact with the mold or only a part of the pipe comes into contact with and presses against the mold , rather than the entire pipe, it is possible to prevent the pipe from bulging into the gap on the dividing line in the mold, and the second It is possible to prevent a sharp division surface mark from being generated between the ring-shaped bulge portion and the first ring-shaped bulge portion.
【００２１】[0021]
【発明の効果】この発明に係るパイプ先端の加工方法
は、パイプを分割式成形型の貫通穴に挿入セットする
際、貫通穴とパイプとの間に隙間部を設け、この隙間部
は第２番目のリング状膨出部を形成するときのパイプ全
体の膨脹を吸収できる程度の大きさとしたものである。
このため第２番目のリング状膨出部形成時にパイプが全
体的に分割式の成形型へ向かって膨脹しても、貫通穴と
パイプとの間にはパイプ膨脹量を吸収できる余裕（隙間
部）があることから、パイプが成形型に接触しない、あ
るいはパイプ全体でなく、パイプの一部が成形型に接し
て押圧するのみとなるので、成形型における分割線上の
隙間にパイプが膨出するのを阻止でき、かつ第２番目の
リング状膨出部と第１番目のリング状膨出部との間に鋭
利な分割面跡が生ずるのを防止できる。According to the method for processing a pipe tip according to the present invention, the pipe is inserted and set in the through hole of the split mold.
At this time, a gap is provided between the through hole and the pipe.
Is the entire pipe when forming the second ring-shaped bulge
It is large enough to absorb the swelling of the body.
Therefore, when the second ring-shaped bulge is formed, the pipe
Even if it expands physically toward the split mold,
A space (gap) that can absorb the amount of expansion of the pipe
Part), the pipe does not come into contact with the mold.
Since the pipe is not the entire pipe but only a part of the pipe comes into contact with and presses against the forming die, it is possible to prevent the pipe from bulging into the gap on the dividing line in the forming die, and to prevent the second ring-shaped expansion. It is possible to prevent a sharp division surface mark from being formed between the projecting portion and the first ring-shaped bulging portion.
【００２２】また、上記両リング状膨出部の間にＯリン
グ等のシール部材を装着する際は、両リング状膨出部間
に鋭利な分割面跡が残らないので、分割面跡の表面処理
工程を省略できる。Further, when a seal member such as an O-ring is mounted between the ring-shaped bulging portions, no sharp division surface marks are left between the ring-shaped bulging portions, so the surface of the division surface marks is left. Processing steps can be omitted.
【図１】この発明に係るパイプ先端の加工方法を適用し
た装置の概略構成図。FIG. 1 is a schematic configuration diagram of an apparatus to which a pipe tip processing method according to the present invention is applied.
【図２】図１に示すＡ矢視図。FIG. 2 is a view on arrow A shown in FIG.
【図３】従来の加工方法の説明図。FIG. 3 is an explanatory view of a conventional processing method.
【図４】図３に示すＢ矢視図。FIG. 4 is a view on arrow B shown in FIG.
１ クランプ ２ パイプ ２ａ 第１番目の膨出部 ２ｂ 第２番目の膨出部 ３ パンチ ７ パンチ ８ 成形型 １０ 間隙部 1 Clamp 2 Pipe 2a 1st bulge 2b 2nd bulge 3 Punch 7 Punch 8 Mold 10 Gap
Claims (1)
ンプに固定されたパイプの先端側に配置される第１また
は第２のパンチと、上記パイプが挿入される貫通穴を有
するとともに、この貫通穴を境に分割してパイプの先端
外周面に配置される分割式成形型とを用い、 上記クランプにパイプを固定した後、このパイプの先端
をクランプ側に向かって第１のパンチで押圧し、これに
より当該パイプの先端外周面に第１番目のリング状膨出
部を形成し、 その後、上記第１のパンチに代えて第２のパンチを用
い、この第２のパンチとクランプとの間に成形型を介挿
し、かつ上記クランプに固定のパイプを分割式成形型の
貫通穴に挿入セットした後、そのパイプの先端を成形型
側に向かって第２のパンチで押圧し、これにより当該パ
イプの先端外周面に第２番目のリング状膨出部を形成す
る、 パイプ先端の加工方法であって、 上記クランプに固定のパイプを分割式成形型の貫通穴に
挿入セットする際、この貫通穴とパイプとの間に、第２
番目のリング状膨出部を形成するときのパイプ全体の膨
脹を吸収できる程度の 隙間部を設けたことを特徴とする
パイプ先端の加工方法。1. A clamp for fixing a pipe and the clamp
No. 1 or 2 arranged on the tip side of the pipe fixed to the pump
Has a second punch and a through hole into which the pipe is inserted.
At the same time, divide this through hole as a boundary and divide the tip of the pipe.
After fixing the pipe to the above clamp using the split type molding die arranged on the outer peripheral surface, the tip of this pipe
To the clamp side with the first punch,
The first ring-shaped bulge on the outer peripheral surface of the tip of the pipe
Part is formed, and then a second punch is used instead of the first punch.
Insert a mold between the second punch and the clamp.
In addition, the pipe fixed to the above clamp is
After inserting and setting in the through hole, the tip of the pipe is molded
Press with a second punch towards the side, which
Form a second ring-shaped bulge on the outer peripheral surface of the tip
It is a method of processing the tip of the pipe, in which the pipe fixed to the above clamp is inserted into the through hole of
When inserting and setting, the second
Expansion of the entire pipe when forming the second ring-shaped bulge
A method for processing a pipe tip, which is characterized in that a gap is provided so that expansion can be absorbed .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17964691A JP2500032B2 (en) | 1991-07-19 | 1991-07-19 | Processing method of pipe tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17964691A JP2500032B2 (en) | 1991-07-19 | 1991-07-19 | Processing method of pipe tip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06277765A JPH06277765A (en) | 1994-10-04 |
| JP2500032B2 true JP2500032B2 (en) | 1996-05-29 |
Family
ID=16069412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17964691A Expired - Fee Related JP2500032B2 (en) | 1991-07-19 | 1991-07-19 | Processing method of pipe tip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2500032B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101013928B1 (en) * | 2003-07-19 | 2011-02-14 | 가부시끼가이샤 히다치 세이사꾸쇼 | Method and device for manufacturing pipe |
-
1991
- 1991-07-19 JP JP17964691A patent/JP2500032B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06277765A (en) | 1994-10-04 |
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