EP1773535A1 - Arrangement for welding two tubes together - Google Patents

Arrangement for welding two tubes together

Info

Publication number
EP1773535A1
EP1773535A1 EP05782183A EP05782183A EP1773535A1 EP 1773535 A1 EP1773535 A1 EP 1773535A1 EP 05782183 A EP05782183 A EP 05782183A EP 05782183 A EP05782183 A EP 05782183A EP 1773535 A1 EP1773535 A1 EP 1773535A1
Authority
EP
European Patent Office
Prior art keywords
tube
free end
section
arrangement
revolution
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.)
Withdrawn
Application number
EP05782183A
Other languages
German (de)
French (fr)
Inventor
Didier Pepin
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1773535A1 publication Critical patent/EP1773535A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • B23K33/006—Filling of continuous seams for cylindrical workpieces

Definitions

  • the invention relates to an arrangement for the connection by welding of a first tube and a second tube of an exhaust line, wherein the front end of the first tube comprises: - a free end section which extends axially inside a rear end section of the second tube, and an intermediate section which extends the free end section and which comprises a weld seam of the rear free end edge of the second tube; a portion of the intermediate section.
  • two circular cylindrical tubes of an exhaust line are connected by welding.
  • the first tube is inserted axially into the second tube inducing a radial clearance between the outer surface of the free end section of the first tube and the inner surface of the end section of the second tube.
  • a weld bead overlaps the end edge of the second tube and the intermediate portion which is an extension of the free end portion of the first tube. But the game can be badly distributed because of the force of gravity. The weld is then defective and can lead to breaks in connection and leakage.
  • the object of the invention is to reliably connect two tubes.
  • the invention proposes an arrangement of the type mentioned above, characterized in that the rear free end edge of the second tube is axially supported on a portion of revolution of the intermediate section.
  • the portion of revolution is a truncated cone.
  • the portion of revolution is a truncated sphere. According to other features of the invention, the portion of revolution is obtained by deformation of the first tube
  • Figure 1 shows an axial sectional view of a volume and an exhaust tube connected according to the prior art.
  • FIG. 2 represents an axial sectional view of a volume and a connected exhaust tube according to the invention
  • FIG. 3 represents an axial half-sectional view of an arrangement for connecting two tubes according to FIG. invention.
  • part of the exhaust line 6 comprises, in particular, an exhaust tube, called the first tube 7, and an exhaust volume 8 such as a silencer, an expansion pot, a catalytic converter.
  • the exhaust volume 8 is located towards the front of the motor vehicle and the exhaust tube 7 is located towards the rear of the motor vehicle.
  • the exhaust volume 8 is extended rearward by a tube, called the second tube 9.
  • the first tube 7 and the volume 8 are connected at the front end 10 of the first tube 7 and at the rear end 15 of the second tube 9 of the volume 8.
  • the front end 10 comprises in particular two sections: a free end section 11 and an intermediate section 12 which is in the extension of the free end section 11.
  • the rear end 15 comprises in particular: a free end edge 13 and an end section 18 which is in the extension of the free end edge 13.
  • the free end portion 11 extends axially inside the section 18.
  • the diameter of the free end section 11 is substantially smaller than the diameter of the end portion 18 creating this way a game. But this game is not uniform because of the force of gravity.
  • a portion 14 of the intermediate section 12 is a truncated sphere. As shown in FIG.
  • the free end edge 13 bears on the portion 14 of the intermediate section 12.
  • the inclination of the wall 14 with respect to the axial direction is preferably chosen to 30 °.
  • the contact of the free end edge 13 with the portion 14 of the intermediate section 12 provides a uniform clearance between the outer surface 16 of the free end section 11 and the inner surface 17 of the section 18.
  • This arrangement also has a self centering effect.
  • the connection of the two tubes 7, 9 is facilitated because as soon as the free end edge 13 is in abutment on the portion 14 of the intermediate section 12, the assembler knows that the welding position is reached and that he can proceed with the welding step. Welding is performed on either side of the edge 13 by overlapping the intermediate portion 12. This arrangement avoids any risk of sagging of the weld bead between the two tubes 7.9.
  • the portion 14 of the intermediate section 12 is a truncated cone.
  • the revolution portion 14 is made by means of a deformation of the tube 7 by technologies well known in the state of the art. technical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention relates to an arrangement for welding a first tube (7) and a second tube (9) of an exhaust line (6) together, in which the front end (10) of the first tube (7) comprises: a free end section (11) axially extending inside a rear (15) end section (18) of the second tube (9), and; an intermediate section (12) that lengthens the free end section (11). A weld seam (19) is provided on the edge of the rear free end (13) of the second tube (9) whereby extending along a portion of the intermediate section (12). The invention is characterized in that the edge of the rear free end (13) is in axial contact over a portion of the revolution (14) on the outside of the intermediate section (12).

Description

AGENCEMENTPOUR LE RACCORDEMENTPARSOUDAGE DE ARRANGEMENT FOR CONNECTION
DEUXTUBESDEUXTUBES
L'invention concerne un agencement pour le raccordement par soudage d'un premier tube et d'un second tube d'une ligne d'échappement, dans lequel l'extrémité avant du premier tube comporte : - un tronçon d'extrémité libre qui s'étend axialement à l'intérieur d'un tronçon d'extrémité arrière du second tube, - et un tronçon intermédiaire qui prolonge le tronçon d'extrémité libre et qui comporte un cordon de soudure du bord d'extrémité libre arrière du second tube sur une portion du tronçon intermédiaire.The invention relates to an arrangement for the connection by welding of a first tube and a second tube of an exhaust line, wherein the front end of the first tube comprises: - a free end section which extends axially inside a rear end section of the second tube, and an intermediate section which extends the free end section and which comprises a weld seam of the rear free end edge of the second tube; a portion of the intermediate section.
Dans l'état de la technique, généralement, deux tubes cylindriques circulaires d'une ligne d'échappement sont raccordés par soudage. Le premier tube est inséré axialement dans le second tube induisant un jeu radial entre la surface externe du tronçon d'extrémité libre du premier tube et la surface interne du tronçon d'extrémité du second tube. Un cordon de soudure chevauche le bord d'extrémité du second tube et le tronçon intermédiaire qui est le prolongement du tronçon d'extrémité libre du premier tube. Mais le jeu peut être mal réparti à cause de la force de gravité. La soudure est alors défectueuse et peut entraîner des ruptures de liaison et des défauts d'étanchéité.In the state of the art, generally, two circular cylindrical tubes of an exhaust line are connected by welding. The first tube is inserted axially into the second tube inducing a radial clearance between the outer surface of the free end section of the first tube and the inner surface of the end section of the second tube. A weld bead overlaps the end edge of the second tube and the intermediate portion which is an extension of the free end portion of the first tube. But the game can be badly distributed because of the force of gravity. The weld is then defective and can lead to breaks in connection and leakage.
Afin de pallier ces inconvénients, l'invention a pour objet de raccorder par soudage de façon fiable deux tubes.In order to overcome these drawbacks, the object of the invention is to reliably connect two tubes.
A cet effet, l'invention propose un agencement du type cité ci-dessus, caractérisé en ce que le bord d'extrémité libre arrière du second tube est en appui axial sur une portion de révolution du tronçon intermédiaire. Selon d'autres caractéristiques de l'invention, la portion de révolution est un tronc de cône.For this purpose, the invention proposes an arrangement of the type mentioned above, characterized in that the rear free end edge of the second tube is axially supported on a portion of revolution of the intermediate section. According to other features of the invention, the portion of revolution is a truncated cone.
Selon d'autres caractéristiques de l'invention, la portion de révolution est un tronc de sphère. Selon d'autres caractéristiques de l'invention, la portion de révolution est obtenue par déformation du premier tubeAccording to other features of the invention, the portion of revolution is a truncated sphere. According to other features of the invention, the portion of revolution is obtained by deformation of the first tube
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description d'exemples de réalisation en référence aux figures annexées.Other features and advantages of the invention will appear on reading the description of exemplary embodiments with reference to the appended figures.
La figure 1 représente une vue en coupe axiale d'un volume et d'un tube d'échappement raccordés selon l'art antérieur.Figure 1 shows an axial sectional view of a volume and an exhaust tube connected according to the prior art.
La figure 2 représente une vue en coupe axiale d'un volume et d'un tube d'échappement raccordés selon l'invention, La figure 3 représente une vue en demi coupe axiale d'un agencement pour le raccordement de deux tubes selon l'invention.FIG. 2 represents an axial sectional view of a volume and a connected exhaust tube according to the invention; FIG. 3 represents an axial half-sectional view of an arrangement for connecting two tubes according to FIG. invention.
Des éléments identiques ou analogues sont désignés par les mêmes chiffres de référence.Identical or similar elements are designated by the same reference numerals.
Telle que représentée à la figure 1 , une partie de ligne d'échappement 6 comporte, en particulier, un tube d'échappement, appelé premier tube 7, et un volume d'échappement 8 tels qu'un silencieux, un pot de détente, un pot catalytique. Tel que représenté sur la figure 1 , le volume d'échappement 8 est situé vers l'avant du véhicule automobile et le tube d'échappement 7 est situé vers l'arrière du véhicule automobile. Le volume d'échappement 8 se prolonge vers l'arrière par un tube, appelé second tube 9.As shown in FIG. 1, part of the exhaust line 6 comprises, in particular, an exhaust tube, called the first tube 7, and an exhaust volume 8 such as a silencer, an expansion pot, a catalytic converter. As shown in Figure 1, the exhaust volume 8 is located towards the front of the motor vehicle and the exhaust tube 7 is located towards the rear of the motor vehicle. The exhaust volume 8 is extended rearward by a tube, called the second tube 9.
Le premier tube 7 et le volume 8 sont raccordés au niveau de l'extrémité avant 10 du premier tube 7 et au niveau de l'extrémité arrière 15 du second tube 9 du volume 8. L'extrémité avant 10 comporte en particulier deux tronçons : un tronçon d'extrémité libre 11 et un tronçon intermédiaire 12 qui est dans le prolongement du tronçon d'extrémité libre 11. L'extrémité arrière 15 comporte en particulier : un bord d'extrémité libre 13 et un tronçon d'extrémité 18 qui est dans le prolongement du bord d'extrémité libre 13. Le tronçon d'extrémité libre 11 s'étend axialement à l'intérieur du tronçon 18. Le diamètre du tronçon d'extrémité libre 11 est sensiblement inférieur au diamètre du tronçon d'extrémité 18 créant de cette façon un jeu. Mais ce jeu est non uniforme à cause la force de gravité. Selon un mode de réalisation, tels que représentés sur la figure 2, une portion 14 du tronçon intermédiaire 12 est un tronc de sphère. Tel que représenté à la figure 3, le bord d'extrémité libre 13 est en appui sur la portion 14 du tronçon intermédiaire 12. L'inclinaison de la paroi 14 par rapport à la direction axiale est choisie, de préférence, jusqu'à 30°. Le contact du bord d'extrémité libre 13 avec la portion 14 du tronçon intermédiaire 12 permet d'obtenir un jeu uniforme entre la surface externe 16 du tronçon d'extrémité libre 11 et la surface interne 17 du tronçon 18. Cet aménagement a également un effet d'auto centrage. Le raccordement des deux tubes 7,9 est facilité car dès que le bord d'extrémité libre 13 est en butée sur la portion 14 du tronçon intermédiaire 12, le monteur sait que la position de soudage est atteinte et qu'il peut procéder à l'étape de soudage. Le soudage est effectué de part et d'autre du bord 13 en chevauchant le tronçon intermédiaire 12. Cet aménagement permet d'éviter tout risque de coulure du cordon de soudure entre les deux tubes 7,9.The first tube 7 and the volume 8 are connected at the front end 10 of the first tube 7 and at the rear end 15 of the second tube 9 of the volume 8. The front end 10 comprises in particular two sections: a free end section 11 and an intermediate section 12 which is in the extension of the free end section 11. The rear end 15 comprises in particular: a free end edge 13 and an end section 18 which is in the extension of the free end edge 13. The free end portion 11 extends axially inside the section 18. The diameter of the free end section 11 is substantially smaller than the diameter of the end portion 18 creating this way a game. But this game is not uniform because of the force of gravity. According to one embodiment, as represented in FIG. 2, a portion 14 of the intermediate section 12 is a truncated sphere. As shown in FIG. 3, the free end edge 13 bears on the portion 14 of the intermediate section 12. The inclination of the wall 14 with respect to the axial direction is preferably chosen to 30 °. The contact of the free end edge 13 with the portion 14 of the intermediate section 12 provides a uniform clearance between the outer surface 16 of the free end section 11 and the inner surface 17 of the section 18. This arrangement also has a self centering effect. The connection of the two tubes 7, 9 is facilitated because as soon as the free end edge 13 is in abutment on the portion 14 of the intermediate section 12, the assembler knows that the welding position is reached and that he can proceed with the welding step. Welding is performed on either side of the edge 13 by overlapping the intermediate portion 12. This arrangement avoids any risk of sagging of the weld bead between the two tubes 7.9.
Selon un autre mode de réalisation, la portion 14 du tronçon intermédiaire 12 est un tronc de cône. Selon les deux modes de réalisation ci-dessus ou d'autres modes de réalisations de l'invention, la portion de révolution 14 est réalisée par l'intermédiaire d'une déformation du tube 7 par des technologies bien connues dans l'état de la technique. According to another embodiment, the portion 14 of the intermediate section 12 is a truncated cone. According to the two embodiments above or other embodiments of the invention, the revolution portion 14 is made by means of a deformation of the tube 7 by technologies well known in the state of the art. technical.

Claims

REVENDICATIONS
1. Agencement pour le raccordement par soudage d'un premier tube (7) et d'un second tube (9) d'une ligne d'échappement (6), dans lequel l'extrémité avant (10) du premier tube (7) comporte :An arrangement for welding connection of a first tube (7) and a second tube (9) of an exhaust line (6), wherein the front end (10) of the first tube (7) ) includes:
- un tronçon d'extrémité libre (11 ) qui s'étend axialement à l'intérieur d'un tronçon (18) d'extrémité arrière (15) du second tube (9),a free end section (11) extending axially inside a rear end section (18) of the second tube (9),
- et un tronçon intermédiaire (12) qui prolonge le tronçon d'extrémité libre (11 ) et qui comporte un cordon de soudure (19) du bord d'extrémité libre arrière (13) du second tube (9) sur une portion du tronçon intermédiaire (12) caractérisé en ce que le bord d'extrémité libre arrière (13) est en appui axial sur une portion de révolution (14) à l'extérieur du tronçon intermédiaire (12).- and an intermediate section (12) which extends the free end section (11) and which comprises a weld seam (19) of the rear free end edge (13) of the second tube (9) on a portion of the section intermediate (12) characterized in that the rear free end edge (13) bears axially on a portion of revolution (14) outside the intermediate section (12).
2. Agencement selon la revendication 1 , caractérisé en ce que la portion de révolution (14) est un tronc de cône.2. Arrangement according to claim 1, characterized in that the portion of revolution (14) is a truncated cone.
3. Agencement selon la revendication 1 , caractérisé en ce que la portion de révolution (14) est un tronc de sphère.3. Arrangement according to claim 1, characterized in that the portion of revolution (14) is a truncated sphere.
4. Agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que la portion de révolution (14) est obtenue par déformation du premier tube (7). 4. Arrangement according to any one of the preceding claims, characterized in that the portion of revolution (14) is obtained by deformation of the first tube (7).
EP05782183A 2004-07-23 2005-06-30 Arrangement for welding two tubes together Withdrawn EP1773535A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0451631A FR2873314A1 (en) 2004-07-23 2004-07-23 ARRANGEMENT FOR THE WELDING CONNECTION OF TWO TUBES
PCT/FR2005/050524 WO2006018559A1 (en) 2004-07-23 2005-06-30 Arrangement for welding two tubes together

Publications (1)

Publication Number Publication Date
EP1773535A1 true EP1773535A1 (en) 2007-04-18

Family

ID=34947573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05782183A Withdrawn EP1773535A1 (en) 2004-07-23 2005-06-30 Arrangement for welding two tubes together

Country Status (3)

Country Link
EP (1) EP1773535A1 (en)
FR (1) FR2873314A1 (en)
WO (1) WO2006018559A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537280A (en) * 1982-04-23 1985-08-27 Thrush Incorporated Exhaust extension pipe replacement kit
FR2562983B1 (en) * 1984-04-16 1986-10-10 Commissariat Energie Atomique EXTERNAL WELDING LIPS PIPING
DE3919496C1 (en) * 1989-06-12 1990-07-05 Mannesmann Ag, 4000 Duesseldorf, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006018559A1 *

Also Published As

Publication number Publication date
WO2006018559A1 (en) 2006-02-23
FR2873314A1 (en) 2006-01-27

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