A study on chip breaking limits in machining

Prediction of chip breaking in machining is an important task for automated manufacturing. This paper presents a study on chip breaking limits. Based on the chip breaking curve, the critical feed-rate is modeled through an an alysis of up-curl chip formation, and the critical depth-of-cut is formulat ed through a discussion of side-curl dominant chip formation processes. Fac tors affecting chip-breaking limits are also discussed. In order to predict the chip breaking limits, semi-empirical models are est ablished. Although the coefficients that occur in the model are estimated t hrough machining tests, the models are applicable to a broad range of machi ning conditions. The model parameters include machining conditions, tool ge ometry, and workpiece material properties.