细长轴切削颤振的稳定性分析和实验研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (5) : 73-76.

论文

细长轴切削颤振的稳定性分析和实验研究

丛春晓；刘恒；吕凯波；景敏卿

作者信息 +

Stability analysis and experiment on cutting chatter of slender shaft

Cong Chun-xiao； Liu Heng； Lv Ka-ibo； Jing Min-qing

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文章历史 +

摘要

为了对细长轴的加工颤振进行稳定性研究，在对细长轴切削颤振机理的研究基础上，建立了刀具和细长轴耦合振动的两自由度系统的再生型颤振分析模型。利用解析法对时滞的动力学方程进行稳定性分析，得出了关于切削宽度和转速的稳定性切削极限图。从结果中可以得出两自由度系统的极限切削宽度比单自由度系统减小了28.6%。该成果可以为柔性零件的高效稳定加工提供理论切削参数。在车铣复合中心上进行了细长轴的切削颤振实验，通过与稳定性极限图的对比，发现实验结果与理论研究相吻合，并且总结出颤振发生前后刀具和细长轴的振动特性变化规律。这种振动特征的变化过程是对加工颤振进行监测和预警的重要识别指标

Abstract

To study the stability of chatter while cutting slender shaft, through the study on chatter mechanism of cutting slender shaft, the analysis model of regenerative chatter is established, which is a two-DOF model of coupling vibration of the tool and slender shaft. The stability of delay dynamic equations are analyzed using an analytical method to get the stability limit figure of cutting chatter about cutting width and rotational speed. The figure shows that the limit width of two-DOF system is reduced by 28.6% compared to single-DOF system. This result can provide theoretical cutting parameters for highly efficient and stable processing of flexible workpieces. The cutting chatter experiments of the slender shaft are done in turn-milling center. Compared with the stability limit figure, the experiment results agree well with the theory. And the features of tool and shaft during chatter are summarized. Which are the important identifications when monitoring and warning the cutting chatter.

导出引用

丛春晓;刘恒;吕凯波;景敏卿. 细长轴切削颤振的稳定性分析和实验研究[J]. 振动与冲击, 2012, 31(5): 73-76

Cong Chun-xiao;Liu Heng;Lv Ka-ibo;Jing Min-qing. Stability analysis and experiment on cutting chatter of slender shaft[J]. Journal of Vibration and Shock, 2012, 31(5): 73-76