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Method for deriving natural frequency of cutting tool, method for creating stability limit curve, and device for deriving natural frequency of cutting tool
Method for deriving natural frequency of cutting tool, method for creating stability limit curve, and device for deriving natural frequency of cutting tool
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机译:推导刀具固有频率的方法,稳定性极限曲线的创建方法以及推导刀具固有频率的装置
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摘要
An apparatus includes a machining executing part causing a machine tool to execute an operation of, while changing a spindle rotation speed of the machine tool in a stepwise manner, machining a workpiece by a predetermined distance or for a predetermined period of time at each spindle rotation speed, a displacement detector detecting a position displacement of a tool during the machining, a cutting force detector detecting a cutting force applied to the tool, a frequency analysis part performing frequency analysis on displacement data and cutting force data for each rotation speed to calculate a displacement spectrum and a cutting force spectrum, and a natural frequency deriving part calculating a compliance spectrum for each spindle rotation speed by deriving the displacement spectrum by the cutting force spectrum, calculating an integrated compliance spectrum by superimposing the compliance spectra, and deriving, as a natural frequency, a frequency showing the largest compliance value.
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