OBRABOTKAMETALLOV technology Vol. 27 No. 2 2025 Results and discussion The workpieces were processed on two machining centers with different actuator layouts. Cutting modes were selected based on the requirements for the quality and accuracy of the surfaces being processed, as well as the tool manufacturer’s recommendations. However, when machining structural steel blanks, the selection of cutting modes was iterative. The initially recommended processing modes caused high vibrations and poor surface quality (see Fig. 2). Increasing the cutting speed (V) to 84 m/min resulted in breakage of the cutting plate. Conversely, reducing the cutting speed (V) to 3 m/min allowed achieving the required surface quality and accuracy without vibrations during machining. a b Fig. 1. Spectrograms of the decomposition coefficients in: a – the scale of all recorded harmonics; b – the range from 0 to 10 harmonics Fig. 2.Photograph of the hole surface obtained as a result of vibrations that occur during processing
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