University POLITEHNICA of Bucharest, Machine and Manufacturing Systems Department Bucharest, Romania ANALYZES GEOMETRY OF PART AND CHIPS AT THE TIME OF REGENERATIVES VIBRATIONS

Abstract: The actions of cut applied to the elastic system cause relative displacements tool/part, which induce a rise in the temperature in the components of the machine tools, its environment, the system-tools-part and generate vibrations. The experimental procedures installation, at the dynamic level, made it possible to determine the elements necessary to a rigorous analysis of the influence of the geometry of the tool, its displacement and evolution of the contacts tool/part and tool/chip on surface carried out Key words: regenerative vibrations, chip variation, self-excited frequencies. 1. INTRODUCTION (10 PT, CAPITALS, BOLD) The dynamic phenomena of the machine tools come from the interaction of the elastic system machine-process of cut. This interaction is thus the generatin