Milling Stability Analysis Based on Chebyshev Segmentation

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Huang, Jianwei^1 ; Li, He^1 ; Han, Ping^1 ; Wen, Bangchun^1

School of Mechanical Engineering and Automation, Northeastern University, Wenhua Road No. 3-11, Heping District, Shenyangl

l0819, China^1

关键词: Calculation accuracy;    Delay differential equations;    Difference quotient;    Milling stability;    Segmentation methods;    Stability issues;    Stability lobe diagrams;    Two-degree of freedom;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012024/pdf
DOI  :  10.1088/1742-6596/744/1/012024

来源: IOP

【 摘 要 】

Chebyshev segmentation method was used to discretize the time period contained in delay differential equation, then the Newton second-order difference quotient method was used to calculate the cutter motion vector at each time endpoint, and the Floquet theory was used to determine the stability of the milling system after getting the transfer matrix of milling system. Using the above methods, a two degree of freedom milling system stability issues were investigated, and system stability lobe diagrams were got. The results showed that the proposed methods have the following advantages. Firstly, with the same calculation accuracy, the points needed to represent the time period are less by the Chebyshev Segmentation than those of the average segmentation, and the computational efficiency of the Chebyshev Segmentation is higher. Secondly, if the time period is divided into the same parts, the stability lobe diagrams got by Chebyshev segmentation method are more accurate than those of the average segmentation.