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Connecting flange for exhaust system of passenger car and method for preventing welding deformation

A technology for connecting flanges and exhaust systems. It is used in flange connection, welding equipment, applications, etc., and can solve the difficulty of ensuring the flatness of the flange connection end face, the sealing problem of the exhaust system, and the exhaust gas leakage of the whole vehicle. problems, to achieve the effect of improving thermal deformation resistance, ensuring sealing performance, and increasing filling density

Inactive Publication Date: 2015-11-04
CHERY COMML VEHICLE ANHUI
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Problems solved by technology

However, due to the level of welding technology and cost control requirements, it is difficult to guarantee the flatness of the flange connection end faces of products produced by many suppliers, which cannot meet the requirements of the main engine factory, resulting in a large amount of rework or waste; in serious cases, it may cause the exhaust system to be sealed. Sexual problems, resulting in vehicle exhaust leakage, noise and emission problems

Method used

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  • Connecting flange for exhaust system of passenger car and method for preventing welding deformation

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Embodiment Construction

[0016] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0017] like figure 1 As shown, the connecting flange of the passenger car exhaust system, one end of the connecting flange 1 is welded to the connecting pipe 2 of the exhaust system, the other end face of the connecting flange 1 is the flange connecting end face 5, and the flange connecting end face 5 is a plane; An anti-deformation groove 3 is provided on the periphery of the welding seam 4 on the end face where the connecting flange 1 and the connecting pipe 2 are welded. The present invention punches a groove 3 at the welding edge of the connecting flange 1 and the connecting pipe 2 to increase the filling density at the welding edge of the flange, improve the thermal deformation resistance of the material, and reduce the deformation of the connecting flange 1 after welding , to ensure ...

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Abstract

The invention discloses a connecting flange for an exhaust system of a passenger car and a method for preventing welding deformation. One end of the connecting flange is welded with a connecting pipe of the exhaust system; the end surface of the other end of the connecting flange serves as a flange connecting end surface; the flange connecting end surface is a plane; and a deformation preventing groove is formed in the periphery of a welding line on the end surface of one end, welded with the connecting pipe, of the connecting flange. As one groove is punched in the welding edge of the connecting flange with the connecting pipe by using a mold, the filling density of the welding edge of the flange is increased, the material heat deformation resistance is enhanced, the deformation quantity of the connecting flange after the welding is reduced, the planeness of the connecting end surface of the flange is guaranteed, the connecting sealing performance of the plane flange is guaranteed, and the sealing performance of the exhaust system is guaranteed.

Description

technical field [0001] The invention relates to a connecting structure of an exhaust system of a passenger car, and relates to a connecting flange of the exhaust system of a passenger car and a method for preventing welding deformation thereof. Background technique [0002] At present, in passenger cars, the components of the exhaust system are mostly connected by stamping flat welding flanges. In order to achieve better sealing effects, the requirements for the flatness of the welding flanges are becoming more and more stringent. However, due to the level of welding technology and cost control requirements, it is difficult to guarantee the flatness of the flange connection end faces of products produced by many suppliers, which cannot meet the requirements of the main engine factory, resulting in a large amount of rework or waste; in serious cases, it may cause the exhaust system to be sealed. Sexual problems, resulting in vehicle exhaust leakage, noise and emissions. Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/026B23K33/00
CPCF16L23/026B23K31/003B23K33/00B23K2101/06
Inventor 陈子兵江杨军崔克天张有文练志华宋法长
Owner CHERY COMML VEHICLE ANHUI
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