Cutting force response in milling of Inconel: analysis by wavelet and Hilbert-Huang Transforms

Abstract

We study the milling process of Inconel. By continuously increasing the cutting depth we follow the system response and appearance of oscillations of larger amplitude. The cutting force amplitude and frequency analysis has been done by means of wavelets and Hilbert-Huang transform. We report that in our system the force oscillations are closely related to the rotational motion of the tool and advocate for a regenerative mechanism of chatter vibrations. To identify vibrations amplitudes occurrence in time scale we apply wavelet and Hilbert-Huang transforms.

Keywords

• milling
• wavelet analysis
• Hilbert-Huang transform
• nonlinear vibration