Influence of the geometrical parameters of the chip groove on chip breaking performance using new-style chip formers

Abstract

With the broader applications of flexible manufacturing systems (FMS), computer integrated manufacturing systems (CIMS), etc., modern technologies using indexable tool inserts with new-style chip formers are employed widely at the present time. The chip-breaking performance of the tool insert is regarded as one of the important factors maintaining the continuity of the machining process. Thus it is necessary to investigate systematically and comprehensively the rules of chip breaking when using new-style chip formers. In this present study, the chip-breaking performance of the asymmetric groove type (AGT) chip former and that of the symmetric groove type (SGT) chip former are compared with each other in detail. The experimental result shows that it is practical to substitute the AGT chip former for the SGT chip former and to investigate the rules of chip breaking during machining processes. Using new-style chip formers, the influence of the geometrical parameters of the chip groove on the chip-breaking performance of the tool insert is investigated through numerous cutting experiments. By means of multiple linear regression, two mathematical models are established to predict the chip breakability for the new-style chip formers. The theoretical predictions are in good agreement with the experimental results under the given cutting conditions.