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| Comparison of Bending and Torsion Deformation Algorithms for Ceramic Core of Hollow Turbine Blade |
| ZHANG Xiandong1, BU Kun1, LIU Lianxi2, DOU Yangliu1 |
( 1. Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education,
Northwestern Polytechnical University, Xi’an 710072, China;
2. Beijing Xinghang Mechanical-Electrical Equipment Co., LTD, Beijing 100074, China)) |
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Abstract Ceramic core is used to form the cooling channel of hollow turbine blade in investment casting process.
The bending and torsion deformations of ceramic core have direct influence on the wall thickness dimension accuracy of
turbine blade. To study bending and torsion deformation of ceramic core generating in manufacturing process, firstly, based
on the definition of bending and torsion deformations for airfoil and the structure characteristics of ceramic core, the algorithms
for computing bending and torsion deformations of ceramic core are studied, including contour-based methods:
Snake-model, spline-fitting method and point-based methods: Convex-hull, 2D-registration, distance-weight method. Secondly,
through computing a simulated known bending and twist deformation, these five methods are compared. The comparing
results indicate that the accuracy and stability of spline-fitting method is better than other methods.
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2016, 
