Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 12, 2019
In recent manufacturing industry, high-value-added workpieces have complex three dimensional and thin walled shapes such as aircraft parts. The workpiece stiffness during machining varies greatly according to machining strategy. The induced displacement and vibration between the tool and the workpiece strongly affect the machining accuracy and tool life. Therefore, proper cutting conditions and parameters regarding workpiece clamping and fixing are required to be selected. However, it is difficult to automatically determine the strategy for a rough machining operation using a commercial CAM system because of the large number of parameter combinations. In the authors’ previous study, a determination method of cutting procedure is proposed for maximizing the workpiece static stiffness based on topology optimization. In this study, dynamic stiffness is considered by maximizing eigenfrequencies of workpiece to improve the determination method of cutting procedure. The feasibility to calculate the optimized workpiece shapes is confirmed through conducting a case study.
