Corrugated pipe thermal fatigue test process based on national VI commercial vehicle

Abstract

The invention relates to a corrugated pipe thermal fatigue test process based on a national VI commercial vehicle. The corrugated pipe thermal fatigue test process comprises the following steps: detecting the size of a corrugated pipe; selecting corresponding test parameters; introducing hot air into the corrugated pipe; testing the thermal fatigue performance of the corrugated pipe; and outputting test results. According to the method, the size coefficient J of the corrugated pipe is calculated by detecting the pipe length L, the radius R and the wall thickness C of the corrugated pipe and adjusting the material correction coefficient alpha in combination with the material type of the corrugated pipe. According to the test system, the J is detected to select the corresponding test temperature and test parameters, and the most real simulation can be effectively carried out on the actual use condition of the corrugated pipe with the size, so that the result with the highest precision isobtained after the test is completed, and the test efficiency of the process is effectively improved.

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...

AI Technical Summary

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

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