Micro-leakage detection method

Abstract

The invention provides a micro-leakage detection method. The micro-leakage detection method comprises the following steps that S1, an area where micro-leakage possibly occurs in a product is judged; S2, a foaming agent is used for spraying the area before the sealing performance test; and S3, during sealing performance test, thermal imaging equipment is adopted to monitor whether a bubbling phenomenon exists in the spraying area in the whole process, and if the bubbling phenomenon exists, the product is judged to be unqualified. The method has the advantages that the foaming agent is used in cooperation, micro leakage which cannot be found by a traditional sealing performance detection technology can be detected, the failure risk of the micro leakage in the sealing piece is eliminated, the position where the micro leakage occurs can be accurately detected, and the direction is pointed out for follow-up production improvement.

Description

Technical field[0001]The present invention relates to the field of sealing detection, and more particularly to a micro-leak detection method.Background technique[0002]With the development of the industry, the sealing requirements of all kinds of parts and assemblies have become more stringent, and traditional sealing testing technology can not meet the requirements of industry development. When a micro-leak-free part, the assembly is generally airtightly detected, the operator will put the standby device in the pressure vessel, calculate the leakage value based on the change of the pressure, but this detection method is attenuated for subtle pressure attenuated Not sensitive, there is no risk of determining the risks and the risk of micro-leaks, that is, the test results are displayed in the standard range, but micro-leakage, seepage, water leakage, oil seepage, etc. will occur in the subsequent actual use. Such risks can only be able to appear in simulation experiments or follow-up...

AI Technical Summary

Problems solved by technology

[0002] With the development of industry, the sealing requirements for various parts and assemblies are becoming more and more stringent, and the traditional sealing detection technology can no longer meet the requirements of industry development.

When performing general air tightness testing on parts and assemblies with micro-leakage, the operator will put the device under test into a pressure vessel and calculate the leakage value based on the change in pressure. Insensitive, so there is a risk that the leak point cannot be determined and the micro-leakage cannot be detected, that is, the test result shows that it is completely within the standard range, but micro-leakage, water seepage, water leakage, oil seepage and other failure modes will occur in subsequent actual use

This kind of risk can only appear in simulation experiments or subsequent actual use, and the harmful impact is huge. If it cannot be contained in time in the early stage, it will be a great waste of production capacity in subsequent processes

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