A method for automatic detection of workpiece vacuum degree

Abstract

The invention provides an automatic workpiece vacuum degree detection method. The method includes: controlling a vacuum pump or a vacuum pump group to vacuumize a to-be-detected workpiece; acquiring a vacuum degree value of the to-be-detected workpiece, generating a first vacuum degree curve, calculating slope of the first vacuum degree curve, and recording as a first curve slope; when the first curve slope is not smaller than a preset slope value, acquiring vacuumizing time, and recording as a first time; acquiring all time characteristic values stored in a preset vacuum performance characteristic list, and comparing the first time with all of the time characteristic values one by one; when the first time is equal to one of the time characteristic values, judging that the detected workpiece is qualified. By the automatic workpiece vacuum degree detection method, the vacuum performance of the workpiece can be detected automatically without manual intervention, labor cost is reduced, extra errors resulted from artificial judgment are prevented, and accordingly accuracy of detection results is improved effectively.

Description

technical field [0001] The invention relates to the field of equipment detection, in particular to an automatic detection method for workpiece vacuum. Background technique [0002] In industrial production, many fields have strict requirements on the airtightness of equipment or equipment parts, such as auto parts, electronic sensors, solenoid valves, refrigeration equipment and parts, etc. Therefore, in the production process, manufacturers Vacuum testing will be carried out on various equipment or workpieces produced by it to ensure that the products produced meet the airtightness requirements of its field. [0003] At present, in terms of the vacuum degree detection of the workpiece, the traditional manual detection method is still adopted. When the workpiece to be tested is connected to the vacuum pump, the workpiece is vacuumed through manual control, and the reading of the vacuum gauge is read. When the vacuum After the counting number reaches the standard value, remo...

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Problems solved by technology

[0003] At present, in terms of the vacuum degree detection of the workpiece, the traditional manual detection method is still adopted. When the workpiece to be tested is connected to the vacuum pump, the workpiece is vacuumed through manual control, and the reading of the vacuum gauge is read. When the vacuum After the counting number reaches the standard value, remove the workpiece. The whole process requires manual participation and depends on manual judgment, and every time the type of test workpiece is changed, the detection parameters need to be manually reset once, so that the vacuum detection process of the workpiece The degree of automation is low, the labor cost is high, and there are certain errors in the test results

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