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Experimental Investigation of the Dynamic Characteristics of a Dualrotary- spindle Milling Head

机译：二元纺锤体铣头动态特性的实验研究

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摘要

The dynamic characteristics of a dual-rotaryspindle milling head are investigated based on the experimental modal analysis.Firstly,modal test is performed on the milling head by using the single-input multiple-output approach,and the frequency response functions (FRF) are acquired.Modal parameters of the structure such as natural frequency,damping ratio and mode shapes are identified.Next,the cutting performance of the milling head is tested.The tool tip FRFs of two cylindrical helix cutters are measured,and the chatter stability are predicted based on the regenerative chatter theory.By combining the visualized mode shape and stability charts,future improvements of the structural design and proper cutting parameters can be proposed.
机译：基于实验模态分析研究了双旋转坪铣头的动态特性。通过使用单输入多输出方法，在铣头上进行模态测试，获取频率响应函数（FRF） 。鉴定了诸如固有频率，阻尼比和模式形状的结构的二极管参数。用铣头的切割性能进行了测试。测量两个圆柱形螺旋切割机的工具尖端FRF，并且基于颤振稳定性关于再生颤振理论。通过组合可视化模式形状和稳定性图表，可以提出结构设计和适当切割参数的未来改进。

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