Method for water immersion ultrasonic c-scan inspection of electron beam welds in turbine casings
A technology of electron beam welding seam and turbine casing, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., to achieve the effect of improving detection efficiency, improving accuracy and reliability, and expanding the range of ultrasonic detection
Active Publication Date: 2018-11-27
CHENGDU ENGINE GROUP
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method for water immersion ultrasonic C-scan detection of the electron beam weld of the turbine casing to solve the problem of how to detect the penetration and defects of the electron beam weld of the turbine casing of the aeroengine proposed in the production and processing of the turbine casing of the aeroengine The problem
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Embodiment 1
[0036] The method used in this embodiment for the water immersion ultrasonic C-scan detection of the electron beam weld seam of the turbine casing mainly includes:
[0037] (1) Ultrasonic C-scan image display of the reference standard flat-bottomed hole of the simulated standard part: the simulation of processing three reference standard flat-bottomed holes with different diameters on the same diameter circle designed according to the outer dimensions of the turbine casing under inspection and the inspection and clamping state The standard part is installed on the rotary table and placed in the water. Adjust the position of the ultrasonic probe to align with the reference standard flat-bottomed hole of the simulated standard part, so that the ultrasonic probe moves outward and inward along the radial direction passing through the center of the flat-bottomed hole by 1 to 2 mm respectively. Detection range: By adjusting the gain, the sensitivity of ultrasonic C-scan detection can...
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Abstract
The invention discloses a water logging ultrasonic C-scan method for testing a turbine case electron beam weld joint. The method comprises the steps of conducting ultrasonic C-scan image display of reference standard flat-bottom holes of a simulation standard component; determining the fusion depth monitoring area of the simulation standard component; conducting ultrasonic C-scan testing on the turbine case electron beam weld joint by means of parameters and steps same as those adopted for ultrasonic C-scan of the simulation standard component and determination of the fusion depth monitoring area, and determining the fusion depth monitoring area of the turbine case electron beam weld joint; judging whether the turbine case electron beam weld joint meets the design requirement by observing a turbine case electron beam weld joint ultrasonic C-scan image and the fusion depth monitoring area determined according to a simulation standard component ultrasonic C-scan image. By using the method for testing the turbine case electron beam weld joint, fusion depth and defects of the electron beam weld joint can be effectively determined, whether the weld joint is qualified is judged, and the method is feasible, accurate and reliable.
Description
technical field [0001] The invention relates to the technical field of detection of electron beam welds of aero-engine turbine casings, in particular to a method for water immersion ultrasonic C-scan detection of electron beam welds of aero-engine turbine casings. Background technique [0002] Turbine casing is a very important part of aero-engine. Due to its structural characteristics, working environment and material properties, the welded connection between part 4 and part 5 of the aero-engine turbine casing has high design requirements for the penetration depth of the weld, defects in the weld, and welding residual deformation. Require. In view of this, electron beam welding (EBW) is used for the welding between the part 4 and the part 5 of the turbine casing of the aero-engine. The energy density of electron beam welding is extremely high, and it is easy to realize deep penetration welding of metal materials. and good stability. It is precisely because of its above-...
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IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 李玲刘建乔惠芳黄志新郑斯宇刘素平张集乔雷何恒刘晓燕姚大卫罗绍凤
Owner CHENGDU ENGINE GROUP