JP4482401B2 - How to connect the exhaust pipe - Google Patents

How to connect the exhaust pipe Download PDF

Info

Publication number
JP4482401B2
JP4482401B2 JP2004238356A JP2004238356A JP4482401B2 JP 4482401 B2 JP4482401 B2 JP 4482401B2 JP 2004238356 A JP2004238356 A JP 2004238356A JP 2004238356 A JP2004238356 A JP 2004238356A JP 4482401 B2 JP4482401 B2 JP 4482401B2
Authority
JP
Japan
Prior art keywords
pipe
exhaust pipe
muffler
converter
connection
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
Application number
JP2004238356A
Other languages
Japanese (ja)
Other versions
JP2005194996A (en
Inventor
弘二 松岡
光郎 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Futaba Industrial Co Ltd
Original Assignee
Futaba Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Futaba Industrial Co Ltd filed Critical Futaba Industrial Co Ltd
Priority to JP2004238356A priority Critical patent/JP4482401B2/en
Publication of JP2005194996A publication Critical patent/JP2005194996A/en
Application granted granted Critical
Publication of JP4482401B2 publication Critical patent/JP4482401B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本発明は、内燃機関の排気系に設けられる排気管とコンバータ又はマフラとを接続する排気管の接続方法に関する。   The present invention relates to an exhaust pipe connecting method for connecting an exhaust pipe provided in an exhaust system of an internal combustion engine and a converter or a muffler.

従来より、内燃機関の排気系は、特許文献１に示すように、排気の流れる方向に沿って、エギゾーストマニホールド、コンバータ、マフラが配置されると共に、各々が排気管で接続されている。排気管とコンバータ、排気管とマフラのそれぞれは、溶接により接続していた。また、マフラは、サブマフラとメインマフラとが設けられる場合もあり、この場合は、排気管とサブマフラ、排気管とメインマフラもそれぞれ溶接により接続していた。   Conventionally, as shown in Patent Document 1, an exhaust system of an internal combustion engine has an exhaust manifold, a converter, and a muffler arranged along an exhaust flow direction, and each is connected by an exhaust pipe. The exhaust pipe and the converter, and the exhaust pipe and the muffler were connected by welding. Further, the muffler may be provided with a sub muffler and a main muffler. In this case, the exhaust pipe and the sub muffler, and the exhaust pipe and the main muffler are also connected by welding.

しかし、溶接による接続では、溶接箇所に応力が集中しやすく、十分な強度を持たせるために、排気管の板厚等に十分な厚さが必要となり、重量低減上の問題となっていた。また、排気の漏れを防止するために、排気管の全周を溶接しなければならず、加工に時間がかかるという問題もあった。更に、溶接により接続するために、排気管等の材質を溶接に適したものを選定しなければならず、排気管等の材質に制約を受けると共に、溶接作業時には、ガスが発生するので、作業環境上も好ましくないという問題があった。   However, in the connection by welding, stress tends to concentrate on the welded part, and in order to give sufficient strength, a sufficient thickness is required for the plate thickness of the exhaust pipe, which has been a problem in weight reduction. In addition, in order to prevent exhaust leakage, the entire circumference of the exhaust pipe must be welded, and there is a problem that it takes time for processing. Furthermore, in order to connect by welding, it is necessary to select a material suitable for welding, such as an exhaust pipe, which is restricted by the material of the exhaust pipe and the like, and gas is generated during welding work. There was also a problem that the environment was not favorable.

そこで、図７に示すように、溶接によらずに、圧入により接続する方法も考えられる。例えば、マフラ１００の端板１０２，１０４に一体的に設けた入口側と出口側の接続管１０６，１０８に、上流側と下流側の排気管１１０，１１２を圧入する。その際、マフラ１００の本体筒部１１４の外周をクランプすると共に、接続管１０６，１０８の外周をクランプして圧入することが考えられる。
特開２００１−２２１０４３号公報 Then, as shown in FIG. 7, the method of connecting by press injection is also considered, without using welding. For example, the exhaust pipes 110 and 112 on the upstream side and the downstream side are press-fitted into the connection pipes 106 and 108 on the inlet side and the outlet side provided integrally with the end plates 102 and 104 of the muffler 100. At that time, it is conceivable to clamp the outer periphery of the main body cylinder portion 114 of the muffler 100 and clamp the outer periphery of the connecting pipes 106 and 108 for press-fitting.
JP 2001-221043 A

しかしながら、こうした圧入による方法では、圧入の際に、端板１０２，１０４、本体筒部１１４や仕切板１１６が変形してしまうという問題があった。
本発明の課題は、変形を招くことなく圧入することができる排気管の接続方法を提供することにある。 However, such a press-fitting method has a problem that the end plates 102 and 104, the main body cylinder portion 114, and the partition plate 116 are deformed during press-fitting.
The subject of this invention is providing the connection method of the exhaust pipe which can be pressed in without causing a deformation | transformation.

かかる課題を達成すべく、本発明は課題を解決するため次の手段を取った。即ち、
内燃機関の排気系に設けられる排気管とコンバータ又はマフラとを接続する排気管の接続方法において、
前記コンバータ又は前記マフラの端板に形成した挿通孔の縁に沿って折曲げ部を形成し、前記挿通孔に挿入した前記コンバータ又は前記マフラの接続管を拡管して前記折曲げ部に密着させると共に、前記折曲げ部の前後に径方向に突き出した固定突起を形成し、かつ、該固定突起と同時に前記コンバータ又は前記マフラの前記接続管に径方向に突き出た突起を形成し、該突起にクランプ治具を係合させて、前記排気管を前記接続管に圧入することを特徴とする排気管の接続方法がそれである。
In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
In an exhaust pipe connection method for connecting an exhaust pipe provided in an exhaust system of an internal combustion engine and a converter or a muffler,
A bent portion is formed along an edge of an insertion hole formed in the end plate of the converter or the muffler, and a connection pipe of the converter or the muffler inserted in the insertion hole is expanded and closely attached to the bent portion. together, the bent portion of forming a fixing protrusion protruding radially back and forth, and to form a projection projecting radially into the connecting pipe at the same time the converter or the muffler and the fixed protrusion, the protrusion The exhaust pipe connection method is characterized by engaging a clamp jig and press-fitting the exhaust pipe into the connection pipe.

前記突起は、前記接続管内に挿入した加工具を径方向外側に膨らませて形成してもよい。また、前記排気管の端を拡管して、徐々に拡管するテーパ管部と、該テーパ管部に連接するストレート管部を形成し、前記テーパ管部をクランプ治具により保持して、前記コンバータ又は前記マフラの前記接続管の外周に前記ストレート管部を圧入してもよい。あるいは、前記圧入後に、前記排気管と前記コンバータ又は前記マフラの接続管との一部を溶接するようにしてもよい。 The protrusion may be formed by inflating a processing tool inserted into the connection pipe radially outward. Further, the end of the exhaust pipe is expanded to form a tapered pipe portion that gradually expands and a straight pipe portion that is connected to the tapered pipe portion, and the tapered pipe portion is held by a clamp jig, and the converter Or you may press-fit the said straight pipe part in the outer periphery of the said connection pipe of the said muffler. Alternatively, after the press-fitting, a part of the exhaust pipe and the connection pipe of the converter or the muffler may be welded.

本発明の排気管の接続方法によると、変形を招くことなく圧入することができるという効果を奏する。   According to the exhaust pipe connecting method of the present invention, there is an effect that press-fitting can be performed without causing deformation.

以下本発明を実施するための最良の形態を図面に基づいて詳細に説明する。
図１に示すように、１はマフラで、マフラ１は本体筒部２を備え、本体筒部２の両端は端板４，６により密閉されると共に、本体筒部２の内部には、仕切板８が設けられている。 The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a muffler. The muffler 1 includes a main body cylinder portion 2, and both ends of the main body cylinder portion 2 are sealed by end plates 4 and 6. A plate 8 is provided.

また、一方の端板４を貫通して、入口側の接続管１０が設けられると共に、他方の端板６を貫通して、出口側の接続管１２が設けられている。両接続管１０，１２は、それぞれ一端が端板４，６を貫通して外部に突出されると共に、他端は本体筒部２の内部の仕切板８に挿入されている。入口側の接続管１０には、上流側の排気管１４が接続されると共に、出口側の接続管１２には、下流側の排気管１６が接続される。   Further, an inlet side connecting pipe 10 is provided through one end plate 4, and an outlet side connecting pipe 12 is provided through the other end plate 6. One end of each of the connecting pipes 10, 12 protrudes outside through the end plates 4, 6, and the other end is inserted into the partition plate 8 inside the main body cylindrical portion 2. The upstream side exhaust pipe 14 is connected to the inlet side connection pipe 10, and the downstream side exhaust pipe 16 is connected to the outlet side connection pipe 12.

本実施形態では、まず、図２に示すように、端板４と入口側の接続管１０とが固定される。接続管１０には、素材として、所定の長さに切断されたパイプが用いられ、端板４にはこの接続管１０を挿入可能な挿通孔１７が形成される。そして、挿通孔１７の縁に沿って外側に折り返された折曲げ部１８がバーリング加工等により形成される。   In this embodiment, first, as shown in FIG. 2, the end plate 4 and the inlet side connecting pipe 10 are fixed. A pipe cut to a predetermined length is used as the material for the connecting pipe 10, and an insertion hole 17 into which the connecting pipe 10 can be inserted is formed in the end plate 4. A bent portion 18 that is folded outward along the edge of the insertion hole 17 is formed by burring or the like.

挿通孔１７に接続管１０を挿入すると共に、接続管１０内には加工具１９が挿入される。加工具１９は、径方向に拡張可能な成形部材２０を備えており、成形部材２０の中心には、軸方向にテーパ孔２２が形成されている。成形部材２０の外周には、３つの突部２４，２６，２８が円周方向に形成されている。成形部材２０は、軸方向に複数に分割、例えば４個、６個、８個等に分割されて形成され、それぞれの分割片が径方向に移動して拡張できるように形成されている。   The connecting pipe 10 is inserted into the insertion hole 17, and the processing tool 19 is inserted into the connecting pipe 10. The processing tool 19 includes a molding member 20 that can be expanded in the radial direction. A taper hole 22 is formed in the center of the molding member 20 in the axial direction. Three protrusions 24, 26, and 28 are formed in the circumferential direction on the outer periphery of the molded member 20. The molding member 20 is divided into a plurality of parts in the axial direction, for example, divided into four, six, eight, etc., and each divided piece is formed so as to expand in the radial direction.

テーパ孔２２には、テーパ軸３０が挿入されており、テーパ軸３０を軸方向に移動させることにより、テーパ軸３０がテーパ孔２２の内周に接触し、成形部材２０は支持部材３２により軸方向の移動が規制されて、成形部材２０を径方向に拡張するように構成されている。   A taper shaft 30 is inserted into the taper hole 22, and the taper shaft 30 contacts the inner periphery of the taper hole 22 by moving the taper shaft 30 in the axial direction. The movement of the direction is restricted, and the molding member 20 is configured to expand in the radial direction.

成形部材２０を径方向に拡張することにより、図３に示すように、接続管１０が、３つの突部２４，２６，２８により径方向に拡張されて、１つの突起３４と２つの固定突起３６，３８とが形成される。１つの突起３４と２つの固定突起３６，３８とは、同一形状でもよく、あるいは、大きさが異なってもよい。   By expanding the molding member 20 in the radial direction, the connecting pipe 10 is expanded in the radial direction by the three protrusions 24, 26, and 28 as shown in FIG. 36, 38 are formed. The one protrusion 34 and the two fixing protrusions 36 and 38 may have the same shape or different sizes.

３つの突起３４，３６，３８のうち、２つの固定突起３６，３８は、端板４の折曲げ部１８の前後両側に形成される。１つの突起３４は、マフラ１の外側に形成される。成形部材２０を径方向に拡張することにより、接続管１０が径方向に拡張されて、折曲げ部１８の内周面に密着されると共に、折曲げ部１８の前後に固定突起３６，３８が形成されて、接続管１０と折曲げ部１８とが密閉・固定される。出口側の接続管１２も同様に１つの突起４２と２つの固定突起４４，４６とが形成され、端板６に形成された折曲げ部４０が、２つの固定突起４４，４６により、密閉・固定される。   Of the three protrusions 34, 36, 38, the two fixed protrusions 36, 38 are formed on both front and rear sides of the bent portion 18 of the end plate 4. One protrusion 34 is formed outside the muffler 1. By expanding the molded member 20 in the radial direction, the connecting pipe 10 is expanded in the radial direction and is brought into close contact with the inner peripheral surface of the bent portion 18, and the fixing protrusions 36 and 38 are provided before and after the bent portion 18. As a result, the connecting pipe 10 and the bent portion 18 are sealed and fixed. Similarly, the connection pipe 12 on the outlet side is formed with one protrusion 42 and two fixing protrusions 44 and 46, and the bent portion 40 formed on the end plate 6 is sealed and sealed by the two fixing protrusions 44 and 46. Fixed.

３つの突起３４，３６，３８を形成した後、図４、図５に示すように、接続管１０に排気管１４を圧入する。その際、本実施形態では、排気管１４に、先端に向かって徐々に拡管するテーパ管部４８を形成すると共に、テーパ管部４８に連接したストレート管部５０を先端まで形成する。ストレート管部５０の内径は、接続管１０の外径よりも僅かに小さく形成して、圧入できるようにする。   After the three protrusions 34, 36, 38 are formed, the exhaust pipe 14 is press-fitted into the connection pipe 10 as shown in FIGS. At this time, in the present embodiment, the exhaust pipe 14 is formed with a tapered pipe portion 48 that gradually expands toward the tip, and a straight pipe portion 50 connected to the taper tube portion 48 is formed to the tip. The straight pipe portion 50 has an inner diameter slightly smaller than the outer diameter of the connection pipe 10 so that it can be press-fitted.

そして、接続管１０の外側の突起３４と１つの固定突起３６の間を、クランプ治具５２でクランプする。クランプ治具５２は、接続管１０の外周をクランプできるように、２つの割型からなると共に、クランプした際に、クランプ治具５２には、接続管１０の外周を包み込む貫通孔５２ａが形成されている。また、クランプ治具５２は、突起３４と固定突起３６の間に挿入されて、突起３４がクランプ治具５２の突起３４側の角部５２ｂに接触するように形成されている。   Then, a clamp jig 52 clamps between the outer protrusion 34 of the connection pipe 10 and one fixed protrusion 36. The clamp jig 52 is composed of two split molds so that the outer periphery of the connection pipe 10 can be clamped, and the clamp jig 52 is formed with a through-hole 52a that wraps around the outer periphery of the connection pipe 10 when clamped. ing. The clamp jig 52 is inserted between the protrusion 34 and the fixed protrusion 36 so that the protrusion 34 comes into contact with the corner portion 52b of the clamp jig 52 on the protrusion 34 side.

排気管１４は、テーパ管部４８がクランプ治具５４によりクランプされる。このクランプ治具５４は、２つの割型からなり、テーパ管部４８の外周をクランプできるように、テーパ管部４８に応じたテーパ孔５６が形成されている。   In the exhaust pipe 14, the tapered pipe portion 48 is clamped by a clamp jig 54. The clamp jig 54 is composed of two split molds, and a tapered hole 56 corresponding to the tapered tube portion 48 is formed so that the outer periphery of the tapered tube portion 48 can be clamped.

クランプ治具５２により、突起３４と固定突起３６の間の接続管１０をクランプすると共に、クランプ治具５４により排気管１４のテーパ管部４８をクランプする。そして、クランプ治具５４によりクランプされた排気管１４を接続管１０側に移動して、排気管１４のストレート管部５０を接続管１０の外周に圧入する。   The connecting pipe 10 between the protrusion 34 and the fixed protrusion 36 is clamped by the clamp jig 52, and the tapered pipe portion 48 of the exhaust pipe 14 is clamped by the clamp jig 54. Then, the exhaust pipe 14 clamped by the clamp jig 54 is moved to the connection pipe 10 side, and the straight pipe portion 50 of the exhaust pipe 14 is press-fitted into the outer periphery of the connection pipe 10.

圧入の際、排気管１４側では、クランプ治具５４がテーパ管部４８を介して圧入による反力を受けるので、クランプ治具５４と排気管１４との間で滑りが生じることはない。一方、接続管１０側では、クランプ治具５２が接続管１０の外周をクランプし、外側の突起３４がクランプ治具５２の角部５２ｂに接触する。これにより、圧入時の接続管１０の軸方向の作用力が突起３４を介してクランプ治具５２の角部５２ｂに伝達され、クランプ治具５２が圧入による反力を受ける。よって、接続管１０とクランプ治具５２との間で滑りが生じることはない。また、端板４や本体筒部２に反力が加わることはなく、これらが変形することもない。更に、仕切板８にも反力が加わらないので、仕切板８が変形することもない。   At the time of press fitting, on the exhaust pipe 14 side, the clamping jig 54 receives a reaction force due to the press fitting through the tapered pipe portion 48, so that slip does not occur between the clamping jig 54 and the exhaust pipe 14. On the other hand, on the connection tube 10 side, the clamp jig 52 clamps the outer periphery of the connection tube 10, and the outer protrusion 34 contacts the corner portion 52 b of the clamp jig 52. Thereby, the acting force in the axial direction of the connecting pipe 10 at the time of press-fitting is transmitted to the corner portion 52b of the clamp jig 52 through the protrusion 34, and the clamp jig 52 receives a reaction force due to press-fitting. Therefore, no slip occurs between the connecting pipe 10 and the clamp jig 52. Further, no reaction force is applied to the end plate 4 or the main body cylinder portion 2, and they are not deformed. Further, since no reaction force is applied to the partition plate 8, the partition plate 8 is not deformed.

他方の出口側の接続管１２と下流側の排気管１６とも、同様にして圧入により接続される。尚、本実施形態では、固定突起３６，３８，４４，４６により、端板４，６と接続管１０，１２を密閉・固定したが、これに限らず、溶接等により密閉・固定してもよい。また、本実施形態では、マフラ１を例としたが、コンバータであっても同様に実施可能である。   The other outlet side connecting pipe 12 and the downstream side exhaust pipe 16 are also connected by press fitting in the same manner. In the present embodiment, the end plates 4 and 6 and the connecting pipes 10 and 12 are sealed and fixed by the fixing protrusions 36, 38, 44, and 46. However, the present invention is not limited to this. Good. Further, in the present embodiment, the muffler 1 is taken as an example, but even a converter can be similarly implemented.

更に、図６に示すように、圧入後に、排気管１４，１６のストレート管部５０，５８とマフラ１の入口側と出口側の接続管１０，１２との一部を溶接により固定するようにしてもよい。溶接は、ストレート管部５０，５８の全周を溶接する必要はなく、周方向に沿って１０〜２０ｍｍ程度の長さの溶接ビード６０，６２を円周上に２箇所程度対称位置に形成できればよく、一部を溶接すれば足りる。また、レーザ溶接、スポット溶接、プラズマ溶接等により、ストレート管部５０，５８の外周側から、ストレート管部５０，５８を貫通して、接続管１０，１２に溶接する、重ね溶接を行えばよい。   Furthermore, as shown in FIG. 6, after press-fitting, the straight pipe portions 50 and 58 of the exhaust pipes 14 and 16 and the connection pipes 10 and 12 on the inlet side and outlet side of the muffler 1 are fixed by welding. May be. It is not necessary to weld the entire circumferences of the straight pipe portions 50 and 58, and welding is possible if the weld beads 60 and 62 having a length of about 10 to 20 mm along the circumferential direction can be formed at two symmetrical positions on the circumference. Well, welding a part is enough. Further, lap welding may be performed by laser welding, spot welding, plasma welding, or the like from the outer peripheral side of the straight pipe portions 50, 58 through the straight pipe portions 50, 58 and welding to the connection pipes 10, 12. .

ストレート管部５０，５８と接続管１０，１２との一部を重ね溶接により固定することにより、床下に配置されているコンバータ、マフラ１が、地面上の岩等の突起に接触し、コンバータ、マフラ１に外力が加わり、排気管１４，１６との間に引き抜き方向の作用力や回転力が働いても、ストレート管部５０，５８と接続管１０，１２とが外れたり、コンバータ、マフラ１や排気管１０，１２が回転するのを防止する。   By fixing a part of the straight pipe portions 50 and 58 and the connecting pipes 10 and 12 by lap welding, the converter and the muffler 1 arranged under the floor come into contact with protrusions such as rocks on the ground, and the converter, Even if an external force is applied to the muffler 1 and an acting force or a rotational force in the pulling direction is applied between the exhaust pipes 14 and 16, the straight pipe portions 50 and 58 and the connection pipes 10 and 12 are disconnected, or the converter and muffler 1 And the exhaust pipes 10 and 12 are prevented from rotating.

以上本発明はこの様な実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得る。   The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

本発明の一実施形態としての排気管の接続方法により排気管を接続した状態を示すマフラの断面図である。It is sectional drawing of the muffler which shows the state which connected the exhaust pipe by the connection method of the exhaust pipe as one Embodiment of this invention. 本実施形態の接続管と端板との接続を示す成形部材拡張前の断面図である。It is sectional drawing before the shaping | molding member expansion which shows the connection of the connection pipe of this embodiment, and an end plate. 本実施形態の接続管と端板との接続を示す成形部材拡張後の断面図である。It is sectional drawing after the shaping | molding member expansion which shows the connection of the connection pipe and end plate of this embodiment. 本実施形態の接続管と排気管との圧入前の状態を示す断面図である。It is sectional drawing which shows the state before the press injection of the connection pipe and exhaust pipe of this embodiment. 本実施形態の接続管と排気管との圧入後の状態を示す断面図である。It is sectional drawing which shows the state after the press injection of the connection pipe and exhaust pipe of this embodiment. 本実施形態の排気管の接続方法により排気管を接続した状態を示すマフラの外形図である。It is the external view of a muffler which shows the state which connected the exhaust pipe by the exhaust pipe connection method of this embodiment. 従来の圧入による排気管を接続した状態を示すマフラの断面図である。It is sectional drawing of the muffler which shows the state which connected the exhaust pipe by the conventional press injection.

符号の説明Explanation of symbols

１，１００…マフラ ２，１１４…本体筒部
４，６，１０２，１０４…端板
８，１１６…仕切板
１０，１２，１０６，１０８…接続管
１４，１６，１１０，１１２…排気管
１７…挿通孔 １８…折曲げ部
１９…加工具 ２０…成形部材
２４，２６，２８…突部
３４，４２…突起
３６，３８，４４，４６…固定突起
４０…折曲げ部 ４８…テーパ管部
５０…ストレート管部 ５２，５４…クランプ治具 DESCRIPTION OF SYMBOLS 1,100 ... Muffler 2,114 ... Main body cylinder part 4, 6, 102, 104 ... End plate 8, 116 ... Partition plates 10, 12, 106, 108 ... Connection pipe 14, 16, 110, 112 ... Exhaust pipe 17 ... Insertion hole 18 ... Bending part 19 ... Processing tool 20 ... Molding members 24, 26, 28 ... Protruding parts 34, 42 ... Protrusions 36, 38, 44, 46 ... Fixing protrusions 40 ... Bending part 48 ... Tapered tube part 50 ... Straight pipe part 52, 54 ... Clamp jig

Claims (4)

内燃機関の排気系に設けられる排気管とコンバータ又はマフラとを接続する排気管の接続方法において、
前記コンバータ又は前記マフラの端板に形成した挿通孔の縁に沿って折曲げ部を形成し、前記挿通孔に挿入した前記コンバータ又は前記マフラの接続管を拡管して前記折曲げ部に密着させると共に、前記折曲げ部の前後に径方向に突き出した固定突起を形成し、かつ、該固定突起と同時に前記コンバータ又は前記マフラの前記接続管に径方向に突き出た突起を形成し、該突起にクランプ治具を係合させて、前記排気管を前記接続管に圧入することを特徴とする排気管の接続方法。 In an exhaust pipe connection method for connecting an exhaust pipe provided in an exhaust system of an internal combustion engine and a converter or a muffler,
A bent portion is formed along an edge of an insertion hole formed in the end plate of the converter or the muffler, and a connection pipe of the converter or the muffler inserted in the insertion hole is expanded and closely attached to the bent portion. together, the bent portion of forming a fixing protrusion protruding radially back and forth, and to form a projection projecting radially into the connecting pipe at the same time the converter or the muffler and the fixed protrusion, the protrusion An exhaust pipe connection method comprising engaging a clamp jig and press-fitting the exhaust pipe into the connection pipe. 前記突起は、前記接続管内に挿入した加工具を径方向外側に膨らませて形成したことを特徴とする請求項１に記載の排気管の接続方法。 The exhaust pipe connection method according to claim 1, wherein the protrusion is formed by expanding a processing tool inserted into the connection pipe radially outward. 前記排気管の端を拡管して、徐々に拡管するテーパ管部と、該テーパ管部に連接するストレート管部を形成し、前記テーパ管部をクランプ治具により保持して、前記コンバータ又は前記マフラの前記接続管の外周に前記ストレート管部を圧入することを特徴とする請求項１または請求項２に記載の排気管の接続方法。 An end of the exhaust pipe is expanded to form a tapered pipe portion that gradually expands, and a straight pipe portion that is connected to the tapered pipe portion, and the taper pipe portion is held by a clamp jig, and the converter or the The exhaust pipe connection method according to claim 1 or 2, wherein the straight pipe portion is press-fitted into an outer periphery of the connection pipe of a muffler. 前記圧入後に、前記排気管と前記コンバータ又は前記マフラの接続管との一部を溶接することを特徴とする請求項１ないし請求項３のいずれかに記載の排気管の接続方法。 Wherein after press-fitting, the connection method of the exhaust pipe according to any one of claims 1 to claim 3, characterized in that welding the portion of the connecting pipe of the converter or the muffler and the exhaust pipe.
JP2004238356A 2003-12-12 2004-08-18 How to connect the exhaust pipe Expired - Fee Related JP4482401B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004238356A JP4482401B2 (en) 2003-12-12 2004-08-18 How to connect the exhaust pipe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003415459 2003-12-12
JP2004238356A JP4482401B2 (en) 2003-12-12 2004-08-18 How to connect the exhaust pipe

Publications (2)

Publication Number Publication Date
JP2005194996A JP2005194996A (en) 2005-07-21
JP4482401B2 true JP4482401B2 (en) 2010-06-16

Family

ID=34829102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004238356A Expired - Fee Related JP4482401B2 (en) 2003-12-12 2004-08-18 How to connect the exhaust pipe

Country Status (1)

Country Link
JP (1) JP4482401B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107701277A (en) * 2017-09-22 2018-02-16 宝沃汽车（中国）有限公司 For muffler tube sheet attachment structure and there is its muffler and gas extraction system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4921019B2 (en) 2006-04-06 2012-04-18 昭和電工株式会社 Joining method between members
JP5019791B2 (en) * 2006-06-05 2012-09-05 昭和電工株式会社 Pipe expansion processing equipment
JP2009052539A (en) 2007-08-01 2009-03-12 Futaba Industrial Co Ltd Exhaust pipe connection structure and exhaust pipe connection method
CN110578594B (en) * 2019-10-17 2023-05-16 徐州瑞田工程机械有限公司 Muffler fixing device
EP3878570A1 (en) * 2020-03-09 2021-09-15 Nesco Oy Method and apparatus for forming a tubular piece, a tubular piece and a ladder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107701277A (en) * 2017-09-22 2018-02-16 宝沃汽车（中国）有限公司 For muffler tube sheet attachment structure and there is its muffler and gas extraction system

Also Published As

Publication number Publication date
JP2005194996A (en) 2005-07-21

Similar Documents

Publication Publication Date Title
US20110215573A1 (en) Exhaust pipe connection structure and exhaust pipe connection method
US5713611A (en) Connection of a plate and tubular members
JP6506315B2 (en) Silencer
JP4482401B2 (en) How to connect the exhaust pipe
JPH07223030A (en) Joining method of pipe and plate stock
EP3822466A1 (en) Exhaust pipe structure, vehicle and method of manufacturing the vehicle
JP2007239537A (en) Exhaust pipe flange joint structure
JPH1061424A (en) Noise eliminator and its manufacture
JPH09257177A (en) Pipe connection structure
JP2007120581A (en) Pipe body connection structure
JP2009197714A (en) Pipe connecting structure and pipe connecting method
JP2007303569A (en) Flanged pipe
JP2005133711A (en) Connecting method of exhaust pipe
JP3262290B2 (en) Pipe and flange welding method
JP7116140B2 (en) Exhaust pipe and exhaust pipe manufacturing method
JPH1089059A (en) Connecting structure of pipe to muffler and connecting method for it
JP2006000873A (en) Method for joining metallic tube
JP2007239921A (en) Pipe joint device
JP4341954B2 (en) Pipe fitting and packing ring unit
JPH09133276A (en) Pipe body connecting structure
JP4039563B2 (en) Connection structure of branch connector in fuel pressure accumulator
JP2645810B2 (en) End member of shell connected to exhaust pipe
JPH08170526A (en) End member of shell connected to exhaust pipe
JP2005337036A (en) Connecting method of exhaust pipe in vehicular muffler
JP2006029293A (en) Fixing structure and method for exhaust pipe in muffler for vehicle

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070810

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091215

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091217

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100210

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100302

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100319

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130326

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140326

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees