JPH0541225Y2 - - Google Patents
Info
- Publication number
- JPH0541225Y2 JPH0541225Y2 JP16701287U JP16701287U JPH0541225Y2 JP H0541225 Y2 JPH0541225 Y2 JP H0541225Y2 JP 16701287 U JP16701287 U JP 16701287U JP 16701287 U JP16701287 U JP 16701287U JP H0541225 Y2 JPH0541225 Y2 JP H0541225Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- connector
- welded
- connector pipe
- weld bead
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000011324 bead Substances 0.000 description 22
- 230000008878 coupling Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 13
- 238000005859 coupling reaction Methods 0.000 description 13
- 238000003466 welding Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、自動車用エンジン等の内燃機関に取
り付けられるエキゾーストマニホールドの改良に
関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of an exhaust manifold attached to an internal combustion engine such as an automobile engine.
一般に、自動車用エンジンには、例えば実開昭
61−152719号公報に開示されるようにエンジンの
各排気ポートから吹き出される排気ガスを一本に
纒めて消音器に送るエキゾーストマニホールドが
取り付けられている。そして、昨今では、従来の
鋳造品に代えて薄肉で重量が軽く、然も、流体抵
抗のないステンレス製のパイプを用いたエキゾー
ストマニホールドが広く使用されるようになつて
いる。
In general, automobile engines include, for example,
As disclosed in Japanese Patent No. 61-152719, an exhaust manifold is installed that collects exhaust gases blown out from each exhaust port of the engine into one and sends it to a silencer. In recent years, exhaust manifolds that use stainless steel pipes that are thin, light in weight, and have no fluid resistance have become widely used instead of conventional castings.
第４図はステンレス製のパイプを用いた従来の
エキゾーストマニホールドを示し、図に於て、符
号１はステレンス製のメインパイプで、その壁面
にはシリンダヘツド３の排気ポートに応じてバル
ジ加工等により環状の結合管部５が突設されてい
る。そして、当該各結合管部５にフランジ７を取
り付けたコネクタパイプ９を夫々嵌合した後、各
嵌合部１１を第５図に示すように全周に亘り溶接
してコネクタパイプ９をメインパイプ１に固着し
た構造となつている。そして、上記フランジ７を
介してシリンダヘツド３と結合し、又、メインパ
イプ１の他端側に取り付けたフランジ１３を介し
て下流側の排気管と結合するようになつている。
尚、上記フランジ７の取付方法としては、フラン
ジ７内にコネクタパイプ９を嵌合した後に溶接す
る方法が採られている。その他、図中、符号１５
は結合管部５とコネクタパイプ９とのコーナ部及
びフランジ７とコネクタパイプ９とのコーナ部に
夫々肉盛りされた溶着鋼からなる溶接ビード、１
７は取付用孔である。 Figure 4 shows a conventional exhaust manifold using stainless steel pipes. In the figure, reference numeral 1 is a stainless steel main pipe, and its wall surface is machined with bulges etc. according to the exhaust port of the cylinder head 3. An annular coupling pipe portion 5 is provided in a protruding manner. Then, after fitting the connector pipes 9 with the flanges 7 attached to each of the joint pipe parts 5, each fitting part 11 is welded around the entire circumference as shown in FIG. 5, and the connector pipe 9 is connected to the main pipe. It has a structure that is fixed to 1. It is connected to the cylinder head 3 via the flange 7, and is connected to the exhaust pipe on the downstream side via the flange 13 attached to the other end of the main pipe 1.
The method for attaching the flange 7 is to fit the connector pipe 9 into the flange 7 and then weld it. Others, code 15 in the figure
Weld beads 1 made of welded steel are built up on the corner portions of the joint pipe portion 5 and the connector pipe 9, and on the corner portions of the flange 7 and the connector pipe 9, respectively.
7 is a mounting hole.
一般に、溶接ビード角が大きくなると、溶接ビ
ードの止端部近傍に応力集中が発生することが知
られているが、上記結合管部５とコネクタパイプ
９の嵌合部１１を溶接する場合、第６図に示すよ
うに兎角溶接ビード１５が大きくなつて溶接ビー
ド角θ1が大きくなつてしまうことが多かつた。
It is generally known that when the weld bead angle becomes large, stress concentration occurs near the toe of the weld bead. As shown in FIG. 6, the weld bead angle θ 1 often became large due to the large rabbit-angle weld bead 15.
そのため、走行振動や内燃機関からの振動によ
つて恒常的に負荷の掛かるマニホールドにあつて
は、斯様に溶接ビード角θ1の大きい溶接ビード１
５の止端部Ｐ近傍に大きな応力が集中し、然も、
コネクタパイプ９側の溶接ビードの止端部Ｐにア
ンダカツト１９が発生してその機械的強度が不足
することもあつて、止端部Ｐ付近のコネクタパイ
プ９に亀裂２１が発生する虞があつた。 Therefore, in the case of manifolds that are constantly subjected to loads due to running vibrations or vibrations from the internal combustion engine, weld bead 1 with a large weld bead angle θ 1 is
A large stress is concentrated near the toe P of 5, and yet,
An undercut 19 was generated at the toe P of the weld bead on the connector pipe 9 side, resulting in insufficient mechanical strength, and there was a risk that a crack 21 would occur in the connector pipe 9 near the toe P. .
本考案は斯かる実情に鑑み案出されたもので、
メインパイプに溶接されるコネクタパイプの溶接
部分の亀裂を防止したエキゾーストマニホールド
を提供することを目的とする。
This invention was devised in view of the actual situation,
An object of the present invention is to provide an exhaust manifold which prevents cracks in the welded portion of a connector pipe welded to a main pipe.
斯かる目的を達成するために、本考案は、壁面
に内燃機関の排気ポートに応じて環状の結合管部
を突設したメインパイプと、上記各結合管部に嵌
合、溶接されてメインパイプと各排気ポートを連
結する複数のコネクタパイプからなるエキゾース
トマニホールドに於て、上記コネクタパイプの結
合管部側端部を夫々縮径してコネクタパイプと結
合管部先端との間に開先を形成すると共に、当該
開先部分を溶接してコネクツパイプをメインパイ
プに固着してなるものである。
In order to achieve such an object, the present invention provides a main pipe in which an annular joint pipe section is protruded from the wall surface according to the exhaust port of an internal combustion engine, and a main pipe that is fitted and welded to each of the above joint pipe sections. In an exhaust manifold consisting of a plurality of connector pipes connecting each exhaust port to the exhaust manifold, the diameter of the connecting pipe side end of each of the connector pipes is reduced to form a groove between the connector pipe and the tip of the connecting pipe. At the same time, the groove portion is welded to secure the connect pipe to the main pipe.
本考案によれば、車両走行時の走行振動や内燃
機関からの振動によつてコネクタパイプと結合管
部との溶接部に応力が作用しても、コネクタパイ
プ及び結合管部の外周から露出する溶接ビードの
形状が滑らかで溶接ビード角が小さなため、応力
の集中は防止され、応力はコネクタパイプとメイ
ンパイプとに分散される。
According to the present invention, even if stress is applied to the welded part between the connector pipe and the coupling pipe part due to running vibrations when the vehicle is running or vibrations from the internal combustion engine, the welded part of the connector pipe and the coupling pipe part is exposed from the outer periphery of the connector pipe and the coupling pipe part. Since the shape of the weld bead is smooth and the weld bead angle is small, stress concentration is prevented and the stress is dispersed between the connector pipe and the main pipe.
以下、本考案の一実施例を図面に基づき説明す
る。尚、上記従来例と同一のものには同一符号を
付してそれらの構造説明は省略する。
Hereinafter, one embodiment of the present invention will be described based on the drawings. Components that are the same as those in the conventional example described above are given the same reference numerals, and a description of their structure will be omitted.
第１図に於て、符号２３は一端にフランジ７が
固着されたコネクタパイプで、当該コネクタパイ
プ２３は結合管部側端部を除いて結合管部５と同
一の外径を有し、又、結合管部側端部は第２図に
示すように60°の縮管角度で縮径されて、結合管
部５の内径と同一の外径を有する縮径部２３′が
形成された構造となつている。そして、メインパ
イプ１への取付けに際し当該縮径部２３′を結合
管部５に嵌合すると、コネクツパイプ２３と結合
管部５の外周面が一致し、又、当該コネクタパイ
プ２３と結合管部５の尖端との間に断面レ形状の
開先２５が形成されるようになつている。 In FIG. 1, reference numeral 23 denotes a connector pipe to which a flange 7 is fixed at one end, and the connector pipe 23 has the same outer diameter as the joint pipe part 5 except for the end on the joint pipe part side. As shown in FIG. 2, the diameter of the joint pipe side end is reduced at a pipe contraction angle of 60°, forming a reduced diameter part 23' having the same outer diameter as the inner diameter of the joint pipe part 5. It is becoming. Then, when the reduced diameter part 23' is fitted into the joint pipe part 5 when attached to the main pipe 1, the outer circumferential surfaces of the connect pipe 23 and the joint pipe part 5 match, and the connector pipe 23 and the joint pipe part 5 A groove 25 having a rectangular cross section is formed between the tip and the tip of the groove.
而して、本実施例に係るエキゾーストマニホー
ルドは、フランジ７内に上記コネクタパイプ２３
の一端側を嵌合して溶接した後、当該コネクタパ
イプ２３の縮径部２３′を上記結合管部５に嵌合
し、次いで、第３図の如くコネクタパイプ２３と
結合管部５の間に形成された断面レ形の開先２５
を利用して、コネクタパイプ２３と結合管部５と
の嵌合部を全周に亘り溶接して両者を固着したも
のである。尚、図中、符号２７は溶着鋼からなる
溶接ビードを示す。 Thus, the exhaust manifold according to this embodiment has the connector pipe 23 inside the flange 7.
After fitting and welding one end side, the reduced diameter part 23' of the connector pipe 23 is fitted into the coupling pipe part 5, and then the space between the connector pipe 23 and the coupling pipe part 5 is Bevel 25 with a rectangular cross section formed in
Using this method, the fitting portion of the connector pipe 23 and the coupling pipe portion 5 is welded over the entire circumference to secure them together. In the figure, reference numeral 27 indicates a weld bead made of welded steel.
このように、本実施例は、コネクタパイプ２３
と結合管部５の嵌合部に開先２５を形成したから
第３図に示すように当該開先２５を利用してコネ
クタパイプ２３と結合管部５を溶接すると、開先
２５内に多くの溶着鋼が充填され、然も、コネク
タパイプ２３と結合管部５の外周面が一致するこ
とも相俟つて、コネクタパイプ２３及び結合管部
５の外周から露出する溶接ビード２７の形状が滑
らかとなり、溶接ビード角θ2が従来例に比し小さ
くなる。従つて、車両走行時の走行振動や内燃機
関からの振動によつて当該溶接部に応力の作用が
あるとしても、溶接ビード角θ2が従来例に比し小
さいために、コネクタパイプ２３側の溶接ビード
２７の止端部P′への応力集中は防止され、応力は
コネクタパイプ２３とメインパイプ１とに分散さ
れることとなる。 In this way, in this embodiment, the connector pipe 23
Since the groove 25 is formed in the fitting part of the connector pipe 23 and the coupling pipe part 5, as shown in FIG. The shape of the weld bead 27 exposed from the outer periphery of the connector pipe 23 and the joint pipe part 5 is smooth because the outer circumferential surfaces of the connector pipe 23 and the joint pipe part 5 coincide with each other. Therefore, the weld bead angle θ 2 is smaller than that of the conventional example. Therefore, even if stress is applied to the welded part due to running vibrations when the vehicle is running or vibrations from the internal combustion engine, the weld bead angle θ 2 is smaller than in the conventional example, so the connector pipe 23 side Stress concentration on the toe P' of the weld bead 27 is prevented, and the stress is dispersed between the connector pipe 23 and the main pipe 1.
従つて、本実施例によれば、従来と同様、溶接
によつてコネクタパイプ２３側の溶接ビード２７
の止端部P′にアンダカツト２９が発生しても、上
述したように溶接ビード角θ2が従来例に比し小さ
いために、コネクタパイプ２３側の溶接ビード２
７の止端部P′への応力集中は防止され、因つて、
コネクタパイプ２３の溶接部に亀裂が発生するこ
とがなくなつた。 Therefore, according to this embodiment, the weld bead 27 on the connector pipe 23 side is welded by welding as in the conventional case.
Even if an undercut 29 occurs at the toe P' of the connector pipe 23, the weld bead 29 on the connector pipe 23 side is
Stress concentration on the toe P′ of 7 is prevented, and therefore,
Cracks no longer occur in the welded portion of the connector pipe 23.
尚、上記実施例は、コネクタパイプ２３の縮管
角度を60°としてコネクタパイプ２３と結合管部
５との溶接部に開先２５を形成したが、コネクタ
パイプ２３の縮管角度を45°乃至90°の範囲で設定
すれば、溶接ビード角θ2を小さく形成することが
でき所期の目的を達成する上で好ましい。又、コ
ネクタパイプ２３を結合管部５に取り付けたと
き、両者の外周面は必ずしも一致する必要はな
く、多少の誤差があつても本考案によつて所期の
目的を達成することが可能である。 In the above embodiment, the constriction angle of the connector pipe 23 was set to 60° and the bevel 25 was formed at the welded part between the connector pipe 23 and the coupling pipe portion 5. However, the constriction angle of the connector pipe 23 was set to 45° or If it is set in the range of 90°, the weld bead angle θ 2 can be formed small, which is preferable in terms of achieving the intended purpose. Furthermore, when the connector pipe 23 is attached to the coupling pipe section 5, the outer peripheral surfaces of the two do not necessarily have to match, and even if there is some error, it is possible to achieve the intended purpose with the present invention. be.
以上述べたように、本考案は、コネクタパイプ
と結合管部の嵌合部に開先を形成したから、当該
開先を利用してコネクタパイプと結合管部を溶接
すると、コネクタパイプ及び結合管部の外周から
露出する溶接ビードの形状が滑らかとなつて溶接
ビード角が小さくなり、その結果、コネクタパイ
プ側の溶接ビードの止端部への応力集中が解消さ
れ、コネクタパイプに亀裂が発生することがなく
なつた。
As described above, in the present invention, since a groove is formed in the fitting part of the connector pipe and the joint pipe part, when the connector pipe and the joint pipe part are welded using the groove, the connector pipe and the joint pipe part are welded. The shape of the weld bead exposed from the outer periphery of the weld becomes smooth and the weld bead angle becomes smaller.As a result, the stress concentration on the toe of the weld bead on the connector pipe side is eliminated and cracks occur in the connector pipe. Things have disappeared.
第１図は本考案の一実施例に係るエキゾースト
マニホールドのコネクタパイプとメインパイプと
の溶接構造を示す断面図である。第２図はコネク
タパイプの結合管部側端部の拡大断面図である。
第３図はコネクタパイプと結合管部との溶接状態
を示す拡大断面図である。第４図は従来のエキゾ
ーストマニホールドの側面図である。第５図は従
来のエキゾーストマニホールドのコネクタパイプ
とメインパイプとの溶接構造を示す断面図であ
る。第６図はコネクタパイプと結合管部との溶接
不良を示す拡大断面図である。
主要な部分の符号の説明、１……メインパイ
プ、５……結合管部、２７……溶接ビード、２３
……コネクタパイプ、２３′……縮径部、２５…
…開先。
FIG. 1 is a sectional view showing a welded structure between a connector pipe and a main pipe of an exhaust manifold according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of the end of the connector pipe on the side of the coupling pipe.
FIG. 3 is an enlarged sectional view showing a welded state of the connector pipe and the coupling pipe section. FIG. 4 is a side view of a conventional exhaust manifold. FIG. 5 is a sectional view showing a welding structure between a connector pipe and a main pipe of a conventional exhaust manifold. FIG. 6 is an enlarged sectional view showing a welding failure between the connector pipe and the coupling pipe section. Explanation of symbols of main parts, 1...Main pipe, 5...Joining pipe section, 27...Weld bead, 23
...Connector pipe, 23'...Reduced diameter part, 25...
...bevel.
Claims (1)
合管部を突設したメインパイプと、上記各結合管
部に嵌合、溶接されてメインパイプと各排気ポー
トを連結する複数のコネクタパイプからなるエキ
ゾーストマニホールドに於て、上記コネクタパイ
プの結合管部側端部を夫々縮径してコネクタパイ
プと結合管部先端との間に開先を形成すると共
に、当該開先部分を溶接してコネクタパイプをメ
インパイプに固着してなることを特徴とするエキ
ゾーストマニホールド。 It consists of a main pipe with an annular connecting pipe section protruding from the wall surface corresponding to the exhaust port of the internal combustion engine, and a plurality of connector pipes that are fitted and welded to each of the above connecting pipe sections to connect the main pipe and each exhaust port. In the exhaust manifold, the connecting pipe side ends of the connector pipes are respectively reduced in diameter to form a groove between the connector pipe and the tip of the connecting pipe, and the grooves are welded to form the connector pipe. An exhaust manifold that is fixed to the main pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16701287U JPH0541225Y2 (en) | 1987-10-31 | 1987-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16701287U JPH0541225Y2 (en) | 1987-10-31 | 1987-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0171124U JPH0171124U (en) | 1989-05-12 |
| JPH0541225Y2 true JPH0541225Y2 (en) | 1993-10-19 |
Family
ID=31454919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16701287U Expired - Lifetime JPH0541225Y2 (en) | 1987-10-31 | 1987-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0541225Y2 (en) |
-
1987
- 1987-10-31 JP JP16701287U patent/JPH0541225Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0171124U (en) | 1989-05-12 |
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