Method for detecting wall thickness of turbojet engine high-pressure turbine blade through ultrasonic waves

Abstract

The invention discloses a method for detecting the wall thickness of a turbojet engine high-pressure turbine blade through ultrasonic waves. The method comprises the following steps of S1, selecting an ultrasonic thickness gauge with waveform display; S2, manufacturing a blade back surface template and a blade basin surface template; S3, manufacturing a standard part for measurement and comparison; cutting a scrapped turbojet engine high-pressure turbine blade into four standard thickness test blocks with different thicknesses along the longitudinal direction of the scrapped turbojet engine high-pressure turbine blade; grinding the standard thickness test blocks, detecting the thickness value after grinding, ensuring that the specifications of the four standard thickness test blocks are 0.4 mm, 0.8 mm, 1.2 mm and 1.6 mm respectively, and ensuring that the material trademarks of the standard thickness test blocks are the same as the material of the high-pressure turbine blade of the turbojet engine to be detected; and S4, measuring the thickness of the blade. The method has the beneficial effects that the process steps are simple, the thickness measurement precision is high, the data is real and reliable, and the flight safety is ensured.

Description

technical field [0001] The invention relates to the technical field of engine turbine blades, in particular to a method for ultrasonically detecting the wall thickness of a high-pressure turbine blade of a turbojet engine. Background technique [0002] The high-pressure turbine blade of the turbojet engine is an important part of the high-pressure turbine. The structure of the high-pressure turbine blade of the turbojet engine is as follows: Figure 1~2 shown, from figure 1 It can be seen that the high-pressure turbine blades of the turbojet engine have three cooling holes. During the long-term use of the high-pressure turbine blades of the turbojet engine, it is found that the I-I section is prone to collapse faults, which will cause blade fractures and other accidents that endanger flight safety, and then lead to Cracks in the blades lead to fractures and other accidents that endanger flight safety. The important reason is that the wall thickness of the high-pressure tur...

AI Technical Summary

Problems solved by technology

Therefore, it is extremely important to measure the wall thickness of the high-pressure turbine blade of a turbojet engine. In China, the electromagnetic Hall effect measurement method is mainly used to measure the wall thickness of the blade. However, the electromagnetic Hall effect often causes the steel ball to be blocked in the inner cavity of the blade, resulting in Lumen excess, resulting in inaccurate thickness measurements

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