The influence of tool wear on the chip-forming mechanism and tool vibrations

Abstract

In this paper we review an experimental investigation of the influence of tool wear on the chip-forming mechanism and the type of segmentation while turning. A direct microscopic analysis of the chip was used to determine the correlation between the tool-wear degree and the morphology of the chip cross-section. During the machining process the vibrations on the tool carrier were measured in the vicinity of the cutting zone. An analysis of the generated chip and vibration signals during the machining confirmed the hypothesis that changes in the tool-wear degree directly impacts on the chip form and the type of segmentation. This investigation contributes to a better understanding of the chip-forming mechanism and the type of segmentation, allowing us to collect high-quality input information that could be used for the subsequent development of a system for tool-wear identification.