拓本
圆度(物体)
振荡(细胞信号)
固有频率
谐波
机械
惯性参考系
物理
声学
工程类
机械工程
经典力学
振动
生物
电压
量子力学
遗传学
作者
Philip V. Bayly,Keith A. Young,Sean G. Calvert,Jeremiah E. Halley
出处
期刊:Journal of Manufacturing Science and Engineering-transactions of The Asme
[ASME International]
日期:2000-11-01
卷期号:123 (3): 387-396
被引量:39
摘要
A quasi-static model of reaming is developed to explain oscillation of the tool during cutting and the resulting roundness errors in reamed holes. A tool with N evenly-spaced teeth often produces holes with N+1 or N−1 “lobes.” These profiles correspond, respectively, to forward or backward whirl of the tool at N cycles/rev. Other whirl harmonics (2N cycles/rev, e.g.) are occasionally seen as well. The quasi-static model is motivated by the observations that relatively large oscillations occur at frequencies well below the natural frequency of the tool, and that in this regime the wavelength of the hole profile is largely independent of both cutting speed and tool natural frequency. In the quasi-static approach, inertial and viscous damping forces are neglected, but the system remains dynamic because regenerative (time-delayed) cutting and rubbing forces are included. The model leads to an eigenvalue problem with forward and backward whirl solutions that closely resemble the tool behavior seen in practice.
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