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A thermal fatigue test process for bellows based on domestic commercial vehicles

A bellows, thermal fatigue technology, applied in the field of bellows testing, can solve problems such as inability to accurately adjust and low testing efficiency

Active Publication Date: 2021-05-07
AEROSUN CORP
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  • Description
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Problems solved by technology

[0005] For this reason, the present invention provides a bellows thermal fatigue testing process based on national VI commercial vehicles to overcome the problem of low test efficiency caused by the inability to accurately adjust the test parameters according to the material and size of the bellows in the prior art

Method used

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  • A thermal fatigue test process for bellows based on domestic commercial vehicles
  • A thermal fatigue test process for bellows based on domestic commercial vehicles

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Embodiment Construction

[0053] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0054] The present invention provides a bellows thermal fatigue testing process based on national VI commercial vehicles, which includes the following steps:

[0055] Step 1: Install the corrugated pipe in the fixture, the test system detects the size of the corrugated pipe, select the corresponding size correction coefficient α according to the material M of the corrugated pipe, and calculate the corrugated pipe according to α and the pipe length, radius and wall thickness of the corrugated pipe The size factor J;

[0056] Step 2: The test system selects the corresponding heating temperature T according to the size coefficient J of the bello...

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Abstract

The invention relates to a bellows thermal fatigue testing process based on a national VI commercial vehicle, including: detecting the size of the bellows; selecting corresponding test parameters; passing hot air into the bellows; testing the thermal fatigue performance of the bellows; output testing result. The present invention calculates the size coefficient J of the bellows by detecting the pipe length L, radius R and wall thickness C of the bellows and adjusting the material correction coefficient α in combination with the material type of the bellows. The test system selects the corresponding The test temperature and test parameters can effectively simulate the actual use conditions of the corrugated pipe of this size in the most realistic way, so that when the test is completed, the result with the highest accuracy can be obtained, which effectively improves the test efficiency of the process.

Description

technical field [0001] The invention relates to the technical field of bellows testing, in particular to a bellows thermal fatigue testing process based on National VI commercial vehicles. Background technique [0002] The metal bellows connect the hot and cold ends of the automobile exhaust system, which can effectively reduce the vibration and impact of the exhaust system caused or transmitted by the engine, body and ground, etc., and reduce the exhaust system caused by the relative displacement of the engine and the exhaust system. Even the vibration of the whole vehicle plays an important role in the vibration reduction and noise reduction of the automobile exhaust system. A car is a harsh, changeable environment and a moving object under load. The car exhaust system is in an extremely harsh environment of high temperature, high humidity, strong vibration, corrosion, and strong airflow. Metal bellows When used here, its service life is also particularly important. [0...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 王枫陈崇昆朱丽静张哲伟
Owner AEROSUN CORP
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