An approach to modeling self-oscillations during metal machining based on a finite-element model with small amount of computing resources

Abstract

A novel approach to the simulation of self-oscillations by the finite-element method is proposed in this paper. It is based on studies of self-oscillations during machining. It allows to study different-scale dynamic phenomena using a model made with small amount of computing resources. The results are consistent with the results of full-scale experiments, analytical calculations and modeling.

Archive of Mechanical Engineering

“…In this case, even a small instantaneous increase in cutting speed due to vibration leads to a noticeable decrease in tool life. It is important that, unlike other processed materials, the contact of the tool in the processing of a titanium-containing alloy occurs on a smaller area and with a very The physical mechanism of perturbation of the MFTW technological system oscillations operates in the following sequence [18,19]. Any random perturbation (for example, non-uniformity of the allowance, heterogeneity of the material being processed, discontinuity in processing, radial runout of the workpiece or tool, etc.)…”

“…In [19,20] it is described that the excitation of vibrations of the MFTW technological system occurs due to the relationship of vertical and horizontal movements of the tool relative to the workpiece. Two dominant oscillatory systems during the cutting process (Fig.…”