Method for detecting air tightness of 12 stations of automotive water seal

Abstract

The invention relates to a method for detecting the air tightness of 12 stations of an automotive water seal. In the method, leaked air bubbles are collected and are converted into differential pressure to enter a differential pressure transducer, and the differential pressure is converted into electric signals for detection, judgment and sorting. The device comprises airtight detection lower dies, airtight detection top dies, a leaked air collecting pipe, die pressing air cylinders, a machine frame, a micro-differential pressure transducer and a touching control screen, wherein a plurality of airtight detection lower dies which are arranged uniformly are arranged at the bottom of the machine frame; the die pressing air cylinders corresponding to the airtight detection lower dies one by one are arranged right above the airtight detection lower dies; the airtight detection top dies corresponding to the airtight detection lower dies are arranged on the lower part of the diepressing air cylinders; and the airtight detection top dies are connected with the micro-differential pressure transducer through the leaked air collecting pipe. In the method and the device, the micro-differential pressure transducer is adopted, the accuracy reaches 9.8 Pa, automatic feeding, automatic detection, automatic judgment, automatic sorting, programmable control and human-computer interface operation can be performed, and the aims of multiple stations, high accuracy, automatic sorting and the reduction of artificial misjudgment are fulfilled.

Description

technical field

[0001] The invention relates to a 12-station automobile water seal airtightness detection method, in particular to a method and device for converting leakage air bubbles into differential pressure detection. Background technique

[0002] The water seal of the automobile water pump needs to be 100% tested for air tightness. At present, the main testing methods include the air bubble method and the special leak tester method. The four-station artificial bubble method is intuitive but must be observed manually, and has no quantification and low efficiency; the special detector is expensive and can only detect a single piece. Contents of the invention

[0003] One of the purposes of the present invention is to provide a method for detecting the airtightness of automobile water seals. This method converts the leakage bubble collection into a differential pressure sensor and converts it into an electrical signal for detection, determination, and sorting, which ov...

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