Application of NURBS Curve Interpolation Algorithm in Steam Turbine Blade NC Machining

Author

Han Qingyao ; Jia Jun ; Yue Ying

Author_Institution

Sch. of Mech. Eng., North China Electr. Power Univ., Baoding, China

fYear

2011

fDate

25-27 April 2011

Firstpage

83

Lastpage

86

Abstract

In order to improve the machining efficiency and precision of steam turbine blade, the accurate mathematics model of complex blade is built with non-uniform rational B-spline. An ameliorative adaptive feed speed interpolation algorithm for an non-uniform rational B-spline curve is proposed aim at blade curvature radius great change. The faster feed speed is adopt to increase the machining efficiency when the blade curvature radius is big. The feed speed is adaptive to control the chord error within the specified range when the blade curvature radius is small. Normal acceleration is guaranteed within the permission scope. The blade is machined on CNC machine with NURBS interpolation to obtain high speed. Test results show that the machining efficiency of blade is not only further improved, but also the contour accuracy is guaranteed.

Keywords

blades; computerised numerical control; interpolation; machining; mechanical engineering computing; rational functions; splines (mathematics); steam turbines; CNC machine; NURBS curve interpolation algorithm; ameliorative adaptive feed speed interpolation algorithm; blade curvature radius; contour accuracy; machining precision; nonuniform rational B-spline; steam turbine blade NC machining; Algorithm design and analysis; Blades; Feeds; Interpolation; Machining; Spline; Surface topography; Blade; Interpolation algorithm; Non-uniform rational B-spline; Numerical control machining;

fLanguage

English

Publisher

ieee

Conference_Titel

Information and Computing (ICIC), 2011 Fourth International Conference on

Conference_Location

Phuket Island

Print_ISBN

978-1-61284-688-0

Type

conf

DOI

10.1109/ICIC.2011.41

Filename

5954509