Abstract
Hollow blades play an important role in the aircraft engines. To ensure the manufacturing quality of the hollow blades, an ultrasonic inspection method for inspecting the internal chamber is proposed in this paper. The measured data is obtained by a five-axis Coordinate Measuring Machine with an ultrasonic probe. To fill the vacancy of data in high-curvature regions, an approximation curve is constructed according to the theoretical section line and the measured points. By adjusting the position of the theoretical clamber point and setting the adjustment direction, the non-uniform shrinkage of the ceramic core is simulated and the calculation amount is reduced. Filling points are obtained from the approximation curve and the internal chamber section is reconstructed by these points. The internal chamber of the hollow blade is evaluated from the two aspects of line profile and wall thickness. The experiments have verified the effectiveness of the proposed method.
Highlights
Turbine blades, as a key component of an aircraft engine, work in extreme environments of high temperature and high pressure [1]
By adjusting the position of the theoretical internal chamber section (ICS) point in the normal direction of the theoretical chamber, the approximation curve is obtained to fill the gap of the measured points and reconstruct the ICS
Since the bending and torsion of the ceramic core in the processing process can be regarded as rigid deformation, this paper focuses on the deformation of the ICS caused by the non-uniform shrinkage of the ceramic core when obtaining the approximation curve
Summary
As a key component of an aircraft engine, work in extreme environments of high temperature and high pressure [1]. Due to the complexity of the structure and the particularity of the material, the processing technology of hollow turbine blades is mainly investment casting technology [4]. The manufacturing process of the hollow turbine blade rough blank based on investment casting is as follows. A mold forming process is used to complete the ceramic core required for the precision casting of the hollow turbine blade. The hollow turbine blade rough blank is prepared through sintering, pouring, demolding, and other processes. The rough blank has to go through subsequent processing steps to complete the preparation of the hollow turbine blade [5]. Measuring the wall thickness of the hollow blade and evaluating its internal chamber section (ICS) is the key to ensure the quality of the hollow blade
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
