A device and method for automatic non-destructive testing of painted beams

Abstract

The invention relates to the technical field of detection equipment for a car body of an EMU, in particular to an automatic non-destructive detection device and method for a painted beam. The motion platform of the device is assembled on the bottom of the beam to be tested, and can walk along the length direction of the beam; one or more probe components are respectively fixed on the motion platform, and each probe component is respectively equipped with a probe body, and each probe body is separately Matching the surface of any position to be tested on the beam, a single probe component can be used to detect a single position to be tested on the beam, or multiple probe components can be used in combination to detect the full coverage of the beam surface; the flaw detector is compatible with each The probe components are connected separately to analyze the detection data to quickly determine the damage site. A detection method is proposed based on the device. The device and the method can directly detect the painted car body crossbeam without an additional paint stripping step, and the detection process is safe and accurate without damaging the outer paint of the crossbeam frame.

Description

technical field [0001] The invention relates to the technical field of detection equipment for a car body of an EMU, in particular to an automatic non-destructive detection device and method for a painted beam. Background technique [0002] my country's EMU maintenance is divided into five levels according to the nature, scope and depth. The first and second levels are operation repairs, which are undertaken by the EMUs; the third to fifth levels are disassembly maintenance, which are repaired at the EMU depot or returned to the factory for maintenance. [0003] At present, when the dismantled aluminum alloy car body of the EMU is returned to the factory for maintenance, it is necessary to perform flaw detection on the beam of the underframe of the car body. During the paint removal step, the fluorescent penetrant is artificially sprayed on the beam for flaw detection. The workload of this flaw detection process is very large, and the fluorescent penetrant used has certain t...

AI Technical Summary

Problems solved by technology

The existing method does not detect the actual painted parts, so in the detection, because there is a certain gap between the comparison pattern and the car body parts, it cannot truly reflect the defects on the car body, so the authenticity of the test results remains to be seen. verify

In addition, most of the existing automatic detection devices are applied to the automatic detection of defects in the welding seams of in-service transmission steel pipe towers and bearing raceways, but there is no automatic detection device suitable for painted aluminum alloys at present.

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