A New Burr Formation Model for Orthogonal Cutting of Ductile Materials

This paper proposes a new model to predict the full formation of a burr in orthogonal cutting. The model is based on the theory of slip-lines, the equilibrium equation, and experimental observations of burr formation with relevant data gathered from previous studies. Unlike with existing models, the proposed model considers the influence of the deformation rate on burr formation as well as the compression factor of the exit surface during burr development. A Mathcad program was created based on the model. The program can visualize burr formation and can predict the geometrical characteristics of the burr. The results of visualization are presented in the paper. The influence of the tool rake angle, the workpiece angle and the undeformed chip thickness, on burr dimensions have been verified in experiments. The experimental results show that the model is suitable in the cutting of ductile materials.