Trajectory Dependent Structural Vibration and Its Effects on Surface Generation

4th International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Yang, Mengxiang^1 ; Mao, Xinyong^1 ; Peng, Yili^1 ; Li, Bin^1^2 ; Jiang, Xuchu^1 ; Li, Liangjie^1

National NC System Engineering Research Centre, Huazhong University of Science and Technology, Wuhan

430074, China^1

State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan

430074, China^2

关键词: Different structure;    Low-frequency vibration;    Machine tool structures;    Machining parameters;    Structural sensitivity;    Structural vibration characteristics;    Structural vibrations;    Vibration characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/491/1/012009/pdf
DOI  :  10.1088/1757-899X/491/1/012009

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The vibration of machine tool plays an important role in surface generation. However, the vibration characteristics is different for different machine tool structures and different machining path. This paper proposed a new method of structural sensitivity analysis to identify trajectory dependent structural vibration and its effect on surface generation in milling. The experimental and theoretical results verify that (i) Multimode low-frequency vibration of the sensitive structures (MLFVSS) directly determines the surface topography in milling; (ii) The sensitivity is different for different structures or the same structure at different modes; (iii) Structural vibration characteristics is related to the machining path, resulting in different influence of the structural vibration on surface generation at different position of the machining path. Finally, a surface topography prediction model was established based on the experimental results. This study is helpful to the optimization of machine tool structures and the selection of machining parameters.