Technological parameter optimizing method for milling and processing of flexible-structure piece

The invention provides a technological parameter optimizing method for milling and processing of a flexible-structure piece. The optimizing method can ensure machining precision while ensuring the processing stability of the flexible-structure piece. A workpiece is mounted on a flexible workpiece processing experiment device to form a flexible workpiece system, and is conducted by technological parameter optimization from the following steps: (1) acquiring modality parameters of the flexible workpiece system; (2) conducting cutting kinetics modeling according to the modality parameters of the flexible workpiece system; (3) acquiring the stability range boundary of the milling cutter cutting flexible workpiece system by utilizing a time domain number value method; (4) adopting the flexible workpiece processing experiment device to conduct cutting experiment to verify the cutting kinetics modeling; (5) adopting the removal rate maximization of the machine tool main shaft cutting material and workpiece vibration minimization as optimization targets and adopting stability range boundary as constraint condition to build a flexible structure piece milling parameter optimization model; acquiring machine tool main shaft rotational speed and cutting depth of optimization through a nonlinear optimization algorithm.