Mechanical and Aerospace Engineering

MAE 297 Seminar

Intelligent Tool Path Planning Driven by Global Optimization in 5-Axis Flank Machining of Complex Geometries

Dr. Chih-Hsing Chu

National Tsing Hua University/UC Davis


5-axis flank milling has been commonly used to produce ruled geometry in the aerospace, automobile, mold, and energy industries, with superior productivity and shaping capability. The tool motion is highly flexible with two additional degrees of freedom in rotation. However, tool path planning in 5-axis flank milling becomes highly complicated with the following difficulties: tool interference frequently occurs, geometrical errors on the machined surface cannot be precisely controlled, to automate the planning process is challenging. This talk introduces an intelligent tool path planning method in 5-axis flank milling of ruled surface based on global optimization. The tool path planning task is transformed into an optimization problem. The objective function and constraints in the optimization can be geometrical or physical conditions imposed by actual machining. Global search schemes are applied to obtain optimal tool paths compliant with the imposed conditions. Experimental results show that our method not only produces smaller errors compared to previous approaches, it also enables novel tool motions that could not be realized before. Examples include generation of reciprocating tool motion, spline-constrained tool path, and tool path planning with reduced cutting forces. This research provides a systematic computational approach for intelligent tool path planning in 5-axis flank milling of complex geometries.

About presenter

Dr. Chih-Hsing Chu is a professor in Department of Industrial Engineering, National Tsing Hua University (NTHU), Taiwan. He attended National Taiwan University (NTU) and received his B.S. and M.S. from Mechanical Engineering. He received his Ph.D. in mechanical engineering at the Laboratory for Manufacturing Automation, University of California at Berkeley, USA. His past work experiences include Web Applications Engineer at Autodesk, USA, Research Intern at DaimlerBenz AG, Germany, and Visiting Researcher at the Laboratory for Machine Tools and Production Engineering (WZL), RWTH Aachen, Germany. Prior to joining NTHU, he was on the faculty of Industrial and Systems Engineering Department, Virginia Tech, USA. He was an invited scholar at CREDITS Center, Sungkunkwan University, Korea. He is now a visiting professor in Department of Mechanical and Aerospace Engineering, University of California, Davis. Dr. Chu has published more than 180 research papers and involved in the editorial work of IEEE Transactions on Automation Science and Engineering, International Journal of Computer Integrated Manufacturing, International Journal of Precision Engineering and Manufacturing, Frontiers in Engineering, and serves as the Editor-in-Chief of Journal of Industrial and Production Engineering, a flagship journal sponsored by the Chinese Institute of Industrial Engineers (CIIE). His research interests include CAD/CAM, augmented reality, intelligent manufacturing, and interactive design. He is a Member of the ASME, IEEE and SME.

Date(s) - 11/16/2017
4:00 pm - 5:00 pm

1062 Bainer Classroom


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