The Peak-to-Valley Height on the Surface Machined with a Serrated End Mill

A calculation model to determine the height of irregularities on the surface machined by a serrated end mill is presented. The effect of radial run-out on the peak-to-valley height of the machined surface is considered. It is shown that the simplification of the calculation schemes (replacement of fourth-order curves with circumferences) does not significantly affect the results of the calculation in the range of the milling parameters typical of actual machining. The influence of the feed per tooth and cutting edge parameters on the roughness of the machined surface is analyzed. It has been established that the peak-to-valley height is reduced with the increase of the radius of the crest of the wave and the number of cutter teeth, and with the decrease of the feed per tooth and the pitch of the waveform. The cutter diameter has little impact on the peak-to-valley height.

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