Airtightness automatic test system and test method

Abstract

Disclosed is an airtightness automatic test method which includes the following steps: (1) a to-be-tested product is placed on a lower die of a test clamp module of the airtightness test system and a control module drives an upper die to descend so as to press tightly the to-be-tested product so that a sealed cavity is formed between the to-be-tested product and the lower die; (2) the control module controls a vacuum pumping and air pressure measurement module to extract air from the sealed cavity via an air extraction hole until a specified time so as to generate a negative pressure; (3) within a specific air pressure test time, air pressure changes in the sealed cavity are measured at different periods and leakage measurement values which are calculated according to current air pressure values at different time periods are compared with maximum leakage quantities which are set respectively so that the qualified rate of the to-be-tested product is controlled according to the time-slice comparison result.

Description

technical field [0001] The invention relates to the technical field of airtightness detection, in particular to the waterproof and airtightness test of casing assembly components of digital products such as mobile phones. Background technique [0002] Existing waterproof and airtight detection technology for shell assembly components of digital products such as mobile phones uses air blowing from the inside to simulate the pressure of the product in water. The pressure situation is opposite, which affects the test results. At the same time, the existing waterproof mobile phone shell assembly component airtightness testing technology uses the method of bubbling to observe whether the product leaks, and judges whether the component is leaking according to the number of bubbling. This judgment method is subjective. Strong, non-quantifiable, easy to misjudgment; on the other hand, the existing airtight testing equipment for waterproof mobile phone shell assembly components does ...

AI Technical Summary

Problems solved by technology

[0002] Existing waterproof and airtight detection technology for shell assembly components of digital products such as mobile phones uses air blowing from the inside to simulate the pressure of the product in water. The pressure situation is opposite, which affects the test results. At the same time, the existing waterproof mobile phone shell assembly component airtightness testing technology uses the method of bubbling to observe whether the product leaks, and judges whether the component is leaking according to the number of bubbling. This judgment method is subjective. Strong, non-quantifiable, easy to misjudgment; on the other hand, the existing airtight testing equipment for waterproof mobile phone shell assembly components does not have airtight test fixtures, which are manually operated, and the test efficiency is low; at the same time, the existing waterproof mobile phone shell assembly components The air tightness testing equipment has low precision, and the test precision is 0.1InH 2 O scale air pressure change

Moreover, the existing test method is a single test for a long time, and the test result can only be known after the end of the test time. The efficiency is low, and the test condition is single, which also affects the accuracy of the test result

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