Collision and interference correction for impeller machining with non-orthogonal four-axis machine tool

Aiming at the four-axis machining with inclined rotary working table, an approach for collision and interference correction is proposed in this paper. Based on the principle that the tool axis vector is limited in the corresponding rotation plane of four-axis machine tools, collision and interference can be eliminated by using the rotation of the ellipse which is the intersection of the plane and the cutter surface. And the minimum necessary rotation angle for the cutter to eliminate interference is obtained by solving the quartic polynomial equations with numerical method. Finally, the process techniques involved in impeller machining with non-orthogonal four-axis machine tools are developed thoroughly, and the experiments of free-form centrifugal impeller machining are rendered with details. Experiment results show that the approach is an effective approach to detect collision and avoid interference for four-axis machining and it can be directly implemented into current CAD/CAM software to promote impeller machining in industry.

[1]  A. N. Poo,et al.  Oriented bounding box and octree based global interference detection in 5-axis machining of free-form surfaces , 2004, Comput. Aided Des..

[2]  Baohai Wu.  Advances in Tool Path Planning Techniques for 5-axis Machining of Sculptured Surfaces , 2008 .

[3]  Tao Ye,et al.  Geometric parameter optimization in multi-axis machining , 2008, Comput. Aided Des..

[4]  Pyo Lim,et al.  Optimization of the rough cutting factors of impeller with five-axis machine using response surface methodology , 2009 .

[5]  Gershon Elber,et al.  Precise global collision detection in multi-axis NC-machining , 2005, Comput. Aided Des..

[6]  Pisut Koomsap,et al.  The sweep plane algorithm for global collision detection with workpiece geometry update for five-axis NC machining , 2007, Comput. Aided Des..

[7]  Erik L. J. Bohez,et al.  A new global accessibility algorithm for a polyhedral model with convex polygonal facets , 2009, Comput. Aided Des..

[8]  Shan Li,et al.  Toolpath Generation for Four-Axis Rough Milling of Sculptured Surface Turbine Blade , 2008, ICIRA.

[9]  Junxue Ren,et al.  Research on tool path planning method of four-axis high-efficiency slot plunge milling for open blisk , 2009 .

[10]  Hong-Tsu Young,et al.  Integrated rough machining methodology for centrifugal impeller manufacturing , 2007 .

[11]  Suk-Hwan Suh,et al.  Avoiding tool interference in four-axis NC machining of rotationally free surfaces , 1992, IEEE Trans. Robotics Autom..

[12]  Peihua Gu,et al.  Recent development in CNC machining of freeform surfaces: A state-of-the-art review , 2010, Comput. Aided Des..

[13]  Yuan-Shin Lee,et al.  Optimizing tool orientations for 5-axis machining by configuration-space search method , 2003, Comput. Aided Des..

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

[15]  Sanjay E. Sarma,et al.  Collision-free finishing toolpaths from visibility data , 2003, Comput. Aided Des..

[16]  Pascal Ray,et al.  The Domain of Admissible Orientation concept: A new method for five-axis tool path optimisation , 2008, Comput. Aided Des..

[17]  Wenping Wang,et al.  Efficient collision detection using a dual OBB-sphere bounding volume hierarchy , 2010, Comput. Aided Des..

[18]  Wang Shang-jin.  Research on 4-axis Numerical Control Machining of Free-form Surface Impellers , 2007 .