An efficient five-axis machining method of centrifugal impeller based on regional milling

This paper presents an efficient five-axis machining method of centrifugal impeller based on regional milling. As the base of the machining method, geometry of the centrifugal impeller and blade surface is analyzed, and sub-machining regions are presented through the division of the double three-cubic d non-uniform rational B-spline (NURBS) surface. In rough milling, the cutter parameters, tool path interval, tool path curves, and the fixed tool axis vector are calculated by the novel algorithm based on regional milling; the biggest cutter and smaller tool path length are obtained. In finish milling, for the aerodynamic performance of the finished impeller, the tool path curves are modified and interlinked to make them uniform and orderly. A modified algorithm of the finish milling of the blade surface is proposed, and not only are the machining errors reduced; their reasonable distribution is also realized. Numerical simulation and a real test impeller are presented as the test of the proposed method.

[1]  Toly Chen.  Intelligent scheduling approaches for a wafer fabrication factory , 2012, J. Intell. Manuf..

[2]  Yoshimi Takeuchi,et al.  5-axis control rough cutting of an impeller with efficiency and accuracy , 1997, Proceedings of International Conference on Robotics and Automation.

[3]  Han Ding,et al.  Tool path optimisation for flank milling ruled surface based on the distance function , 2010 .

[4]  Kuan-Hung Chen.  Investigation of tool orientation for milling blade of impeller in five-axis machining , 2011 .

[5]  Ying Zhang,et al.  Collision and interference correction for impeller machining with non-orthogonal four-axis machine tool , 2013 .

[6]  Wei Wang,et al.  A novel five-axis rough machining method for efficient manufacturing of centrifugal impeller with free-form blades , 2013 .

[7]  Chih-Hsing Chu,et al.  An integrated framework of tool path planning in 5-axis machining of centrifugal impeller with split blades , 2012, J. Intell. Manuf..

[8]  Ming Luo,et al.  An approach to optimize the tilt angle of indexable table for nonorthogonal four-axis milling of impeller , 2015 .

[9]  Li Xun,et al.  The CNC grinding of integrated impeller with electroplated CBN wheel , 2015 .

[10]  Rufeng Xu,et al.  Reducing fluctuation of machining strip width by tool position modification for five-axis NC machining of sculptured surfaces , 2015 .

[11]  Joost Duflou,et al.  A geometric modeling and five-axis machining algorithm for centrifugal impellers , 1997 .

[12]  Aun Neow Poo,et al.  Adaptive iso-planar tool path generation for machining of free-form surfaces , 2003, Comput. Aided Des..

[13]  Chih-Hsing Chu,et al.  Tool path planning for 5-axis flank milling of ruled surfaces considering CNC linear interpolation , 2012, J. Intell. Manuf..

[14]  Gérard Poulachon,et al.  Optimal strategy for finishing impeller blades using 5-axis machining , 2012 .

[15]  Chih-Hsing Chu,et al.  Tool path planning for five-axis flank milling with developable surface approximation , 2006 .

[16]  H-Z Fan,et al.  Optimizing tool-path generation for three-axis machining of a sculptured impeller blade surface , 2012 .

[17]  Kai Tang,et al.  Five-axis tool path generation for a flat-end tool based on iso-conic partitioning , 2008, Comput. Aided Des..

[18]  C. Y. Wu.  Arbitrary Surface Flank Milling of Fan, Compressor, and Impeller Blades , 1995 .

[19]  Chih-Hsing Chu,et al.  Spline-constrained tool-path planning in five-axis flank machining of ruled surfaces , 2015 .

[20]  Paul J. Gray,et al.  Arc-intersect method for 5-axis tool positioning , 2005, Comput. Aided Des..

[21]  Chung-Hua Wu.  A General Theory of Three-Dimensional Flow in Subsonic and Supersonic Turbomachines of Axial, Radial, and Mixed-Flow Types , 1952, Journal of Fluids Engineering.

[22]  A. A. Ball,et al.  Integrated method for tool path generation in five-axis sculptured surface machining , 2011 .

[23]  L.-C. Chuang,et al.  A five-axis rough machining approach for a centrifugal impeller , 2004 .

[24]  Li-Min Zhu,et al.  Cutter size optimisation and interference-free tool path generation for five-axis flank milling of centrifugal impellers , 2012 .