Study On Measuring Methods And Chip Breaking Mechanism Of 3D Non-Uniform Groove Cutting Tools

The development of metal cutting is to ensure high production with high automation and unmanned participant, which demands a reliable treat with chips. Control of chip-breaking is the key of treat with chips. And it is essential to study chip breaking limits of 3D non-uniform groove cutting tools in order that we can make a precise prediction of chip-breaking with different insert groove.The groove parameters is the base to study 3D groove chip-breaking limits. But the more complex the shape of 3D groove is, the more difficult to get the groove parameters with general method. So we introduce the function of 3D Profile Measurement Instrument and research 3D Measurement systems that have existed combining with the technology of 3D profile measurement in order to get accurate insert groove parameters of 3D non-uniform groove cutting tools.Based on the theory of up-curl chip breaking limits, we get the theoretic predictive formula of chip's curling radius of two-dimensional groove chips which can be defined by nine parameters and the theoretic predictive formula of Critical feed-rate; based on the chips dynamics and its breaking criterion theory of the transverse up-curl chips' forming course, we get the theoretic predictive formula of Critical depth-of-cut and did a series of systemic experiment study.Based on the study of chip-breaking limits about two-dimensional groove, we research chip-breaking limits about 3D groove. Firstly, we establish relation between cutting parameters and the critical feed rate, obtain the predictive formula and test it after having studied chip breaking when PCD tool cutting aluminum alloy with chip-breaker. Secondly, based on the analysis of 3D groove breaking mechanism, weestablish the chip-breaking theoretic predictive formula of 3D groove. Finally, in order to test the chip-breaking theoretic formula of 3D groove inserts, we do a series of chip-breaking experiments.